# China-Philippines South China Sea tensions, May-Sept 2026 > Live situation record from CLSTR: https://clstr.news/situations/philippinesus-china-scarborough-shoal-tension > Updated: 2026-09-11T07:41:32.000Z. Sources: 137. Developments: 26. Tensions between China and the Philippines have intensified through September 2026, marked by shifting maritime strategies and increased military activity. The Armed Forces of the Philippines (AFP) has observed a change in China’s presence; while Chinese navy and maritime militia vessel counts have decreased, the number of China Coast Guard ships and research/survey vessels has risen. Specifically, the Philippine Navy monitored 77 different Coast Guard vessels in the first half of 2026, compared to 68 the previous year, alongside an increase in research vessels exhibiting erratic tracks in areas including the Bashi Channel and Benham Rise. Diplomatic friction remains high as both nations exchange accusations of disinformation. Philippine Coast Guard spokesperson Rear Admiral Jay Tarriela has emphasized the necessity of the “fight for truth,” while Chinese Embassy Deputy Spokesperson Guo Wei has accused him of fabricating narratives. Regarding the BRP Sierra Madre at Ayungin Shoal, Rear Admiral Roy Vincent Trinidad rejected claims that the Philippines committed to removing the vessel, accusing Beijing of attempting to “rewrite history” and citing past deceptive tactics at Mischief Reef. In early September, the Chinese People's Liberation Army Southern Theater Command intensified combat readiness patrols in the waters and airspace surrounding Scarborough Shoal. Beijing maintains these operations are a “necessary and legitimate response” to Philippine provocations and asserts its sovereignty over the shoal based on sea baselines established in late 2024. Diplomatic confrontations have also moved to international forums. During the Seoul Defense Dialogue, Philippine Defense Minister Gilberto Teodoro denounced a written protest note from the Chinese delegation, labeling the gesture an attempt at “actual coercion, intimidation, and aggression” that disregards international law. ## Claims - The exercises were intended to improve interoperability among the three allies and promote peace, stability and security in the Indo‑Pacific region. (disputed by 7 sources) - The drills were intended to test and improve combat readiness and defend China’s territorial sovereignty and maritime rights. (disputed by 4 sources) - China described the drills as a response to actions of “certain countries” that undermine regional peace and stability. (disputed by 3 sources) - The United States accused China of using dubious environmental and legal pretexts to advance territorial claims near Scarborough Shoal. (corroborated by 11 sources) - The Philippines, United States and Japan conducted joint maritime exercises in the South China Sea from July 21 to July 25. (corroborated by 8 sources) - Chinese Coast Guard used water cannons against Philippine vessels near Scarborough Shoal on multiple days during the drill period. (corroborated by 8 sources) - Chinese Coast Guard personnel struck a Filipino sailor with a baton at Second Thomas Shoal before the joint drills began. (corroborated by 8 sources) - China continues to reject the 2016 international arbitration ruling that dismissed its expansive South China Sea claims. (corroborated by 8 sources) - The drills involved naval warships, coast‑guard vessels, surveillance aircraft and fighter jets. (corroborated by 7 sources) - China published new management rules for a national nature reserve around Scarborough Shoal. (corroborated by 7 sources) - Philippine armed‑forces chief Gen. Antonio Nafarrete visited Thitu Island (Philippine‑occupied Spratly) during the drills. (corroborated by 6 sources) ## Timeline ### 2026-09-11: Philippines rejects China's claims over Panganiban and Zamora reefs The Philippine Department of Foreign Affairs rejected China's sovereignty claims over Panganiban and Zamora reefs, stating that island-building does not change their legal status as low-tide elevations. 4 sources. https://clstr.news/cluster/philippines-rejects-chinas-claims-over-panganiban-and-zamora-reefs ### 2026-09-02: China conducts military patrols near Scarborough Shoal China's Southern Theater Command conducted combat readiness patrols near Scarborough Shoal to defend its sovereignty against perceived maritime provocations by the Philippines. 4 sources. https://clstr.news/cluster/china-conducts-military-patrols-near-scarborough-shoal ### 2026-08-24: Philippines and China exchange accusations over West Philippine Sea claims Philippines and China exchange accusations of disinformation regarding the West Philippine Sea and the presence of the BRP Sierra Madre at Ayungin Shoal. 5 sources. https://clstr.news/cluster/philippines-and-china-exchange-accusations-over-west-philippine-sea-claims ### 2026-08-21: Philippines and China clash over South China Sea territorial claims The Philippines and China are engaged in a maritime dispute, with Manila rejecting demands to remove the BRP Sierra Madre and Beijing warning Philippine aircraft over Scarborough Shoal. 4 sources. https://clstr.news/cluster/philippines-and-china-clash-over-south-china-sea-territorial-claims ### 2026-08-18: China shifts West Philippine Sea presence toward coast guard The Philippines reports that China is shifting its West Philippine Sea presence from navy vessels toward increased China Coast Guard and research ship operations. 4 sources. https://clstr.news/cluster/china-shifts-west-philippine-sea-presence-toward-coast-guard ### 2026-08-10: United States condemns China's maneuvers at Scarborough Shoal The United States has denounced China's use of a new “national nature reserve” at Scarborough Shoal as a pretext to expand territorial control and restrict Filipino fishermen's access to traditional waters. 3 sources. https://clstr.news/cluster/united-states-condemns-chinas-maneuvers-at-scarborough-shoal ### 2026-08-10: China contests maritime boundary negotiations between Japan and the Philippines China has launched maritime law enforcement operations to oppose Japan and the Philippines' efforts to delimit their maritime boundaries, while Taiwan navigates conflicting claims in the South China Sea. 8 sources. https://clstr.news/cluster/china-contests-maritime-boundary-negotiations-between-japan-and-the-philippines ### 2026-08-09: South China Sea tensions escalate amid maritime disputes South China Sea tensions rise following China's new management measures for Huangyan Island and the sinking of the Vietnamese vessel Khoi Nguyen 18 near Da Chu. 3 sources. https://clstr.news/cluster/south-china-sea-tensions-rise-amid-maritime-disputes ### 2026-08-07: China warns Philippines with South China Sea drills near Huangyan Dao China says its South China Sea drills near Huangyan Dao are a serious warning against Philippine provocations, asserting sovereignty and urging the Philippines to stop illegal actions. 3 sources. https://clstr.news/cluster/china-warns-philippines-with-south-china-sea-drills-near-huangyan-dao ### 2026-08-02: China conducts naval drills near Scarborough Shoal, raising South China Sea tensions China’s naval and air drills near Scarborough Shoal heightened South China Sea tensions after water‑cannon incidents and a near‑collision with Philippine vessels, amid recent US‑Philippines‑Japan exercises. 4 sources. https://clstr.news/cluster/china-conducts-naval-drills-near-scarborough-shoal-raising-south-china-sea-tensions ### 2026-08-01: Taiwan Reaffirms Claim on Scarborough Shoal After Philippines Files UN Chart Taiwan reaffirmed its claim over Scarborough Shoal after the Philippines filed an official chart with the UN, prompting China to denounce the move as illegal and a violation of its sovereignty. 5 sources. https://clstr.news/cluster/philippines-files-un-chart-for-scarborough-shoal-heightening-south-china-sea-tensions ### 2026-08-01: China imposes patrols and bans access to disputed Huangyan Dao shoal China set new rules and routine patrols for the Huangyan Dao shoal, banning entry and activities without approval while conducting naval‑air drills, escalating its dispute with the Philippines. 4 sources. https://clstr.news/cluster/china-imposes-patrols-and-bans-access-to-disputed-huangyan-dao-shoal ### 2026-08-01: Philippines monitors surge of Chinese vessels in West Philippine Sea Philippine forces reported 26 Chinese warships and coast‑guard vessels in four West Philippine Sea sites in late July, while China held joint naval‑air drills near Scarborough Shoal in August, heightening sea‑t 2 sources. https://clstr.news/cluster/philippines-monitors-surge-of-chinese-vessels-in-west-philippine-sea ### 2026-07-31: China protests Philippines' baseline claim on Huangyan Island The Philippines set a maritime baseline around Huangyan Island; China condemned it as illegal, citing UN law, and warned of a firm response, while Chinese forces held joint drills nearby, heightening South Sea‑ 2 sources. https://clstr.news/cluster/china-protests-philippines-baseline-claim-on-huangyan-island ### 2026-07-31: China launches naval and air drills around Scarborough Shoal China’s PLA and Coast Guard conducted joint naval‑air drills around Scarborough Shoal, citing readiness and sovereignty, while also banning illegal resource extraction and deploying JL‑10 trainers amid tensions 11 sources. https://clstr.news/cluster/china-conducts-naval-and-air-drills-around-scarborough-shoal ### 2026-07-28: China-Philippines clashes intensify South China Sea dispute Chinese coast guard clashes with the Philippine navy at Second Thomas and Scarborough Shoals, while Beijing ramps up patrols around Taiwan, raising tensions across a key global shipping corridor. 4 sources. https://clstr.news/cluster/china-philippines-clashes-intensify-south-china-sea-dispute ### 2026-07-26: United States, Japan and Philippines Hold Joint South China Sea Drills The US, Japan and Philippines carried out five‑day joint naval drills in the South China Sea (July 21‑25) amid recent clashes with Chinese coast‑guard vessels; new Philippine chief Antonio Nafarrete visited Thị 6 sources. https://clstr.news/cluster/united-states-japan-and-philippines-hold-joint-south-china-sea-drills ### 2026-07-24: Philippines, US and Japan conduct joint South China Sea drills amid China tensions The Philippines, US and Japan held joint South China Sea drills (July 21‑25) amid rising tensions, with water‑cannon attacks and a baton incident involving Chinese Coast Guard and Filipino vessels. 19 sources. https://clstr.news/cluster/china-philippines-tensions-rise-over-south-china-sea-and-batanes-islands ### 2026-07-24: China Coast Guard fires water cannons at Philippine vessels near Scarborough Shoal On 24 July 2026, China Coast Guard fired water cannons at Philippine vessels near Scarborough Shoal, disabling communications and risking collision, sparking protests and U.S. diplomatic remarks. 4 sources. https://clstr.news/cluster/china-coast-guard-fires-water-cannons-at-philippine-vessels-near-scarborough-shoal ### 2026-07-21: China-Philippines South China Sea clash escalates in July 2024 A July 2024 clash at Ayungin Shoal saw Filipino sailors hit by Chinese coast guard, sparking protests by the Philippines, a strong Chinese response, mutual ambassador recalls, and heightened regional tensions. 13 sources. https://clstr.news/cluster/china-protests-philippines-over-renai-reef-clash ### 2026-07-21: US condemns China's aggressive actions after South China Sea clash with Philippines The US condemned China's “dangerous and aggressive” actions after a South China Sea clash with the Philippines, while China warned Manila of “bitter consequences” ahead of an ASEAN summit. 5 sources. https://clstr.news/cluster/us-condemns-chinas-dangerous-actions-after-philippines-clash-in-south-china-sea ### 2026-07-20: Philippines and China exchange protests after Second Thomas Shoal clash Philippine and Chinese foreign ministers met in Manila and exchanged strong protests over a July clash at Second Thomas Shoal, each blaming the other for violent actions. 5 sources. https://clstr.news/cluster/philippines-and-china-exchange-protests-after-second-thomas-shoal-clash ### 2026-07-20: Chinese Coast Guard strikes Filipino sailor with baton at Second Thomas Shoal On July 20 2026 Chinese Coast Guard hit a Filipino sailor with a wooden baton at Second Thomas Shoal, injuring him. The Philippines condemned the act as aggressive, China denied it, and the clash heightened SE 34 sources. https://clstr.news/cluster/chinese-coast-guard-strikes-philippine-sailor-at-second-thomas-shoal ### 2026-06-30: China patrols Scarborough Shoal in South China Sea China's military and coast guard patrolled the disputed Scarborough Shoal on June 30, citing territorial claims, after recent U.S.–Philippines drills; the Philippines did not comment. 4 sources. https://clstr.news/cluster/china-patrols-scarborough-shoal-in-south-china-sea ### 2026-06-09: Philippines protests Chinese floating platform on Scarborough Shoal The Philippines protested a Chinese six‑metre floating platform on Scarborough Shoal, calling it illegal; China defended the move as sovereign scientific activity, deepening South China Sea tensions. 5 sources. https://clstr.news/cluster/china-installs-floating-platform-at-disputed-scarborough-shoal-prompting-philippine-protest ### 2026-05-31: China conducts patrols around Scarborough Shoal and east of Taiwan amid Philippine‑US tensions China patrolled near Scarborough Shoal and east of Taiwan after a U.S.–Philippines exercise, warning that Japan‑Philippine boundary talks are illegal. 10 sources. https://clstr.news/cluster/philippines-and-united-states-conduct-third-maritime-cooperative-activity-at-scarborough-shoal --- Cite as: China-Philippines South China Sea tensions, May-Sept 2026. CLSTR, https://clstr.news/situations/philippinesus-china-scarborough-shoal-tension