Sea temperature in Bonaire
Live water temperatures and swimming conditions across 5 beaches on the Bonaire coast.
Best time to swim in Bonaire
The sea in Bonaire peaks in July, when the water averages around 29°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 26°C, when cold-water swimmers dominate the coast.
Bonaire sea temperature history
Long-term climatology for Bonaire shows an annual mean sea temperature of 27°C, ranging from 26°C in winter to 29°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 Bonaire, 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.
Bonaire sea temperature: frequently asked questions
What is the warmest month to swim in Bonaire?
July is the warmest month in Bonaire, when the sea averages about 29°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Bonaire?
The coldest month in Bonaire is typically January, when the water averages around 26°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Bonaire without a wetsuit?
The main swimming season in Bonaire 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 Bonaire?
Bonaire 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 Bonaire?
The long-term annual mean sea temperature in Bonaire is about 27°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Bonaire?
The live reading at the top of this page shows the current sea temperature in Bonaire, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Bonaire sea temperature by month
Average sea temperatures around Bonaire for every month of the year, based on long-term Open-Meteo marine climatology.
| Month | Average sea | Swimming comfort |
|---|---|---|
| January | 26.0°C | Warm swimming |
| February | 26.0°C | Warm swimming |
| March | 26.0°C | Warm swimming |
| April | 27.0°C | Very warm, bath-like |
| May | 28.0°C | Very warm, bath-like |
| June | 28.0°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 | 28.0°C | Very warm, bath-like |
| November | 27.0°C | Very warm, bath-like |
| December | 26.0°C | Warm swimming |
Monthly figures are modelled climatology averages, not live readings. How accurate is our data?
Warmest beaches in Bonaire right now
| Beach | Region | Sea | Swim score |
|---|---|---|---|
| Sorobon Beach | Bonaire | 29.6°C | Excellent |
| Te Amo Beach | Bonaire | 28.6°C | Excellent |
| Bachelor's Beach | Bonaire | 28.6°C | Excellent |
| Pink Beach Bonaire | Bonaire | 28.5°C | Excellent |
| Klein Bonaire | Bonaire | 28.4°C | Excellent |
Sea temperature in Bonaire — FAQ
How warm is the sea in Bonaire in September?
The sea off Bonaire averages about 29.0°C in September, based on long-term monthly averages for this coast.
When is the best time to swim in Bonaire?
Bonaire is warmest in July (around 29.0°C) and coldest in January (around 26.0°C). There are typically 12 months a year when the water sits above 22°C.
What is the average yearly sea temperature in Bonaire?
Across all twelve months, the sea in Bonaire averages about 27.4°C.
Do you need a wetsuit to swim in Bonaire?
In peak season (around July, ~29.0°C) most swimmers are comfortable without a wetsuit. Outside summer, when the water drops toward 26.0°C, a 3/2mm to 5/4mm wetsuit is recommended.