Japan
Okinawa · Pacific Ocean

Mibaru BeachSea temperature now

Coastal beach near Nanjo.

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

Sea temperature now
27.5°Ctropical
Excellent
Updated just now · Source: Open-Meteo Marine
Air
Waves
Wind
UV

Location

Mibaru 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.

Monthly sea temperature averages

Typical year-round water temperature, based on regional climatology.

18°C28°C· Current month outlined· “Best” = within 2°C of the annual peak

Best time to swim in Mibaru Beach

The sea in Mibaru Beach peaks in July, when the water averages around 28°C.

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

On average, 8 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.

Shoulder months like March and December are noticeably cooler but often quieter, with fewer crowds and steadier weather.

The coldest month is typically January at around 18°C, when cold-water swimmers dominate the coast.

Mibaru Beach sea temperature history

Long-term climatology for Mibaru Beach shows an annual mean sea temperature of 23°C, ranging from 18°C in winter to 28°C at the summer peak.

The seasonal swing is roughly 10°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 Mibaru 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
18°C
Feb
18°C
Mar
19°C
Apr
21°C
May
23°C
Jun
26°C
Jul
28°C
Aug
28°C
Sep
27°C
Oct
24°C
Nov
21°C
Dec
19°C

Mibaru Beach sea temperature: frequently asked questions

What is the warmest month to swim in Mibaru Beach?

July is the warmest month in Mibaru Beach, when the sea averages about 28°C. Late-season warmth often persists a few weeks after peak.

When is the sea coldest in Mibaru Beach?

The coldest month in Mibaru Beach is typically January, when the water averages around 18°C. Cold-water swimmers and surfers dominate this period.

When can you swim in Mibaru Beach without a wetsuit?

The main swimming season in Mibaru Beach runs from April – November — about 8 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 Mibaru Beach?

Outside peak summer the water in Mibaru Beach drops toward 19°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 Mibaru Beach?

The long-term annual mean sea temperature in Mibaru Beach is about 23°C, based on multi-decadal climatology of the surrounding waters.

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

The live reading at the top of this page shows the current sea temperature in Mibaru 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: Apr – May – Jun – Jul – Aug – Sep – Oct – Nov

MonthSeaComfort
Jan18°CPleasant
Feb18°CPleasant
Mar19°CPleasant
Apr21°CPleasant
May23°CWarm
Jun26°CHot
Jul28°CHot
Aug28°CHot
Sep27°CHot
Oct24°CWarm
Nov21°CPleasant
Dec19°CPleasant

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