Surat Thani · Gulf of Thailand

Bophut Beach Water Temperature & Swim Forecast

Coastal beach in Koh Samui.

Very warm water with a light chop and a light breeze — great swimming conditions.

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Sea temperature now

29.4°Ctropical

Excellent

Source: Open-Meteo Marine

Model estimate · modelled, not a buoy measurement. How accurate is this?

Plan your next swim

Find a warmer beach nearbyCompare nearby water temperatures today. 29.0°C Compare with the closest beachSee both swim conditions side by side.Check the best month hereSee the warmest seasonal water outlook. April

Air temperature

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Wave height

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Wind

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UV index

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Location

Bophut Beach on the map, with nearby beaches and live sea temperatures.

7-day forecast

Water, air, waves, wind and UV outlook for the week ahead.

Wetsuit recommendation

No wetsuit

At 29.4°C the water is warm enough to swim and surf in just a swimsuit or boardshorts.

Surf & watersports

Tropical-feel conditions. Most swimmers stay comfortable for an hour or more without thermal protection. UV exposure is the bigger risk — sunscreen and a rash vest are worth packing.

Open-water swimming

Open-water swims of 60+ minutes feel comfortable with no neoprene.

Recommendation tuned for Bophut Beach's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.

Bophut Beach swimming conditions summary

Water temperature: 29.4°C
Water feels: Bath-warm
Swimmable today: Yes — comfortable for most swimmers
Swim conditions score: 86/100 · Excellent
Wetsuit needed: No wetsuit
Air temperature: —
Waves: —
Wind: —
UV index: —
Average sea temperature (September): 29.0 °C
Warmest months to swim: March, April, May

At 29.4°C the water is warm enough to swim and surf in just a swimsuit or boardshorts. Model estimate. Water, wave, wind and UV values are Open-Meteo marine/weather model estimates, refreshed hourly — not buoy measurements.

Frequently asked questions

Can I swim at Bophut Beach right now?

The sea at Bophut Beach is currently 29.4°C — excellent swimming conditions. Most swimmers will find the water comfortable when it's above 22°C; below 18°C feels fresh and a wetsuit is recommended.

What will the sea temperature be at Bophut Beach next week?

Based on long-term September averages and the latest marine model, expect the sea around Bophut Beach to sit close to 29.0°C over the next 7 days. Check the live 7-day chart above for the exact daily outlook.

When is the best month to swim at Bophut Beach?

March – April – May are typically the warmest months to swim at Bophut Beach, with sea temperatures at their seasonal peak.

Do I need a wetsuit at Bophut Beach?

With water currently at 29.4°C: above 22°C no wetsuit needed; 18–22°C a shorty is comfortable for long swims; 14–18°C a 3/2mm full suit; below 14°C a 4/3mm or thicker.

Quick answer

Can I swim at Bophut Beach today?

The sea is currently 29.4°C — excellent swimming conditions. Most swimmers will find it pleasant.

Key takeaways

• Located in Surat Thani, Thailand (Gulf of Thailand).
• Family friendly with calm, accessible water.
• Live data refreshed hourly from Open-Meteo Marine.

Monthly sea temperature averages

Tap any month to see what to expect — based on regional climatology.

Jan27°CBest Feb28°CBest Mar29°CBest Apr30°CBest May30°CBest Jun29°CBest Jul29°CBest Aug29°CBest Sep29°CBest Oct29°CBest Nov28°CBest Dec27°CBest

27°C → 30°C· Current month outlined· “Best” = within 2°C of the annual peak

Best time to swim in Bophut Beach

The sea in Bophut Beach peaks in April, when the water averages around 30°C.

The main swimming season runs from January – December, when surface temperatures stay comfortable for extended sessions.

On average, 12 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.

The coldest month is typically January at around 27°C, when cold-water swimmers dominate the coast.

Bophut Beach sea temperature history

Long-term climatology for Bophut Beach shows an annual mean sea temperature of 29°C, ranging from 27°C in winter to 30°C at the summer peak.

The seasonal swing is roughly 3°C between the coldest and warmest month — a useful yardstick when comparing years or checking whether the current sea is running above or below average.

Recent decades have trended slightly warmer at Bophut Beach, in line with regional sea-surface temperature records for the wider basin.

Monthly averages below are drawn from multi-decadal climatology and are updated as new observations arrive.

Jan

27°C

Feb

28°C

Mar

29°C

Apr

30°C

May

30°C

Jun

29°C

Jul

29°C

Aug

29°C

Sep

29°C

Oct

29°C

Nov

28°C

Dec

27°C

Bophut Beach sea temperature: frequently asked questions

What is the warmest month to swim in Bophut Beach?

April is the warmest month in Bophut Beach, when the sea averages about 30°C. Late-season warmth often persists a few weeks after peak.

When is the sea coldest in Bophut Beach?

The coldest month in Bophut Beach is typically January, when the water averages around 27°C. Cold-water swimmers and surfers dominate this period.

When can you swim in Bophut Beach without a wetsuit?

The main swimming season in Bophut Beach runs from January – December — about 12 months a year when the sea sits above 20°C, the level most swimmers describe as pleasant without a wetsuit.

Do I need a wetsuit in Bophut Beach?

Bophut Beach stays warm year-round, so most swimmers never need a wetsuit — a rash guard is usually enough for sun and wildlife protection.

What is the average sea temperature in Bophut Beach?

The long-term annual mean sea temperature in Bophut Beach is about 29°C, based on multi-decadal climatology of the surrounding waters.

How do I check the current sea temperature in Bophut Beach?

The live reading at the top of this page shows the current sea temperature in Bophut Beach, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.