Sea temperature in Singapore
Live water temperatures and swimming conditions across 2 beaches on the Singapore coast.
Best time to swim in Singapore
The sea in Singapore 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 28°C, when cold-water swimmers dominate the coast.
Singapore sea temperature history
Long-term climatology for Singapore shows an annual mean sea temperature of 29°C, ranging from 28°C in winter to 30°C at the summer peak.
The seasonal swing is roughly 2°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 Singapore, 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.
Values are area averages; individual beaches vary by exposure and depth.
Singapore sea temperature: frequently asked questions
What is the warmest month to swim in Singapore?
April is the warmest month in Singapore, when the sea averages about 30°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Singapore?
The coldest month in Singapore is typically January, when the water averages around 28°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Singapore without a wetsuit?
The main swimming season in Singapore 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 Singapore?
Singapore 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 Singapore?
The long-term annual mean sea temperature in Singapore is about 29°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Singapore?
The live reading at the top of this page shows the current sea temperature in Singapore, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Singapore sea temperature by month
Average sea temperatures around Singapore for every month of the year, based on long-term Open-Meteo marine climatology.
| Month | Average sea | Swimming comfort |
|---|---|---|
| January | 28.0°C | Very warm, bath-like |
| February | 28.0°C | Very warm, bath-like |
| March | 29.0°C | Very warm, bath-like |
| April ⭐ | 30.0°C | Very warm, bath-like |
| May | 30.0°C | Very warm, bath-like |
| June | 29.0°C | Very warm, bath-like |
| July | 29.0°C | Very warm, bath-like |
| August | 29.0°C | Very warm, bath-like |
| September | 29.0°C | Very warm, bath-like |
| October | 29.0°C | Very warm, bath-like |
| November | 28.0°C | Very warm, bath-like |
| December | 28.0°C | Very warm, bath-like |
Monthly figures are modelled climatology averages, not live readings. How accurate is our data?
Warmest beaches in Singapore right now
| Beach | Region | Sea | Swim score |
|---|---|---|---|
| Palawan Beach | Sentosa | 29.4°C | Excellent |
| Siloso Beach | Sentosa | 28.4°C | Excellent |
Sea temperature in Singapore — FAQ
How warm is the sea in Singapore in September?
The sea off Singapore averages about 29.0°C in September, based on long-term monthly averages for this coast.
When is the best time to swim in Singapore?
Singapore is warmest in April (around 30.0°C) and coldest in January (around 28.0°C). There are typically 12 months a year when the water sits above 22°C.
What is the average yearly sea temperature in Singapore?
Across all twelve months, the sea in Singapore averages about 28.8°C.
Do you need a wetsuit to swim in Singapore?
In peak season (around April, ~30.0°C) most swimmers are comfortable without a wetsuit. Outside summer, when the water drops toward 28.0°C, a 3/2mm to 5/4mm wetsuit is recommended.