Zaimokuza Beach Sea Temperature & Swim Forecast
Wide sandy beach beside Yuigahama.
Pleasant water with a light chop and a light breeze — great swimming conditions.
Location
Zaimokuza 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.
Rash vest or swimsuit
At 23.7°C most swimmers and surfers are comfortable in a swimsuit or thin rash top.
Recommendation tuned for Zaimokuza Beach's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.
Can I swim at Zaimokuza Beach today?
The sea is currently 23.7°C — excellent swimming conditions. Most swimmers will find it pleasant.
- • Located in Kanagawa, Japan (Pacific Ocean).
- • 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.
Best time to swim in Zaimokuza Beach
The sea in Zaimokuza Beach peaks in July, when the water averages around 24°C.
The main swimming season runs from June – September, when surface temperatures stay comfortable for extended sessions.
On average, 4 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
Shoulder months like May and October are noticeably cooler but often quieter, with fewer crowds and steadier weather.
Outside peak season the water drops toward 14°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable.
The coldest month is typically February at around 12°C, when cold-water swimmers dominate the coast.
Zaimokuza Beach sea temperature history
Long-term climatology for Zaimokuza Beach shows an annual mean sea temperature of 18°C, ranging from 12°C in winter to 24°C at the summer peak.
The seasonal swing is roughly 12°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 Zaimokuza 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.
Zaimokuza Beach sea temperature: frequently asked questions
What is the warmest month to swim in Zaimokuza Beach?
July is the warmest month in Zaimokuza Beach, when the sea averages about 24°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Zaimokuza Beach?
The coldest month in Zaimokuza Beach is typically February, when the water averages around 12°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Zaimokuza Beach without a wetsuit?
The main swimming season in Zaimokuza Beach runs from June – September — about 4 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 Zaimokuza Beach?
Outside peak summer the water in Zaimokuza Beach drops toward 14°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable. In peak months most swimmers go without.
What is the average sea temperature in Zaimokuza Beach?
The long-term annual mean sea temperature in Zaimokuza Beach is about 18°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Zaimokuza Beach?
The live reading at the top of this page shows the current sea temperature in Zaimokuza Beach, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Year-round sea temperature
Best swim months: Jun – Jul – Aug – Sep
| Month | Sea | Comfort |
|---|---|---|
| Jan | 13°C | Cold |
| Feb | 12°C | Cold |
| Mar | 13°C | Cold |
| Apr | 15°C | Bracing |
| May | 18°C | Pleasant |
| Jun | 21°C | Pleasant |
| Jul ⭐ | 24°C | Warm |
| Aug | 24°C | Warm |
| Sep | 22°C | Warm |
| Oct | 19°C | Pleasant |
| Nov | 16°C | Bracing |
| Dec | 14°C | Bracing |
Nearby beaches
The closest coastline, with live water temperatures.