| Jan | Cool water (26°C) and good visibility (15-25m) under the northeast monsoon. Thresher shark encounters remain reliable at Kimud Shoal; Gato Island tunnel dives excellent. Fewer crowds than peak months. |
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| Feb | Similar to January — cool water (26°C), NE monsoon conditions prevail. Visibility 15-25m. Thresher sharks consistent at dawn; macro life abundant at Lighthouse and Bantigue. Good month for photography. |
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| Mar | Warming trend begins — water 27-28°C, visibility improving to 20-30m. Start of peak season. Thresher sharks, tiger sharks at Monad, and scalloped hammerheads possible. Calmest seas of the year approaching. |
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| Apr | Peak conditions — 28-29°C water, 20-35m visibility, calm seas. Best month for thresher shark photography with optimal light. Hammerheads still present at Monad. Mandarin fish mating at its most reliable. |
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| May | Warmest month (29-30°C) with peak visibility 20-35m. Thresher sharks highly reliable; manta ray sightings increase at Kimud. Last month before monsoon transition. Book well ahead — busiest month. |
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| Jun | Southwest monsoon onset brings warmer surface water (28-30°C) but reduced visibility (10-20m). Thresher sharks still present at Kimud. Fewer divers, better deals. Some days may be cancelled due to weather. |
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| Jul | SW monsoon in full effect — 28-29°C water, visibility 10-20m. Occasional typhoon risk. Thresher sharks still daily at Kimud; macro diving at its richest with calm inshore waters. Low season prices. |
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| Aug | Continued SW monsoon — 28-29°C, 10-20m visibility. Thresher sharks consistent at dawn. Mandarin fish mating ritual continues reliably at sunset. Quietest month for tourism — maximum solitude on dive sites. |
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| Sep | Late SW monsoon — 28-29°C, visibility 10-20m. Thresher sharks remain reliable. Dona Marilyn wreck dives excellent in current conditions. Macro life peaks at Bantigue and Lighthouse. Last weeks of low-season pricing. |
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| Oct | Transition month between monsoons — 27-29°C water, variable visibility 10-15m. Seas can be rougher with less predictable conditions. Thresher sharks still present but some days may be blown out. Good deals available. |
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| Nov | NE monsoon begins — 27-28°C water, visibility improving to 10-15m. Thresher sharks consistent; conditions stabilizing toward peak season. Good month for those seeking moderate crowds with improving conditions. |
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| Dec | NE monsoon established — 26-27°C water, visibility 15-25m. Thresher sharks, tiger sharks, and hammerheads all possible. Holiday season brings crowds — book ahead. Mandarin fish mating reliable at sunset. |
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