Atami, a coastal hot spring resort in Shizuoka Prefecture, enjoys a humid subtropical climate with distinct seasons. Summers are warm, humid, and rainy, while winters are mild but can feel chilly due to sea breezes. The area is known for abundant rainfall, lush greenery, and a long swimming season, making it a popular year-round destination.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colors of the months:
The color shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the color is shows the travel season: full color means high season, soft color means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The gray info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Atami’s climate is characterized by warm, humid summers and mild, breezy winters. Average daytime temperatures peak at 30°C in August, with nights cooling to around 24°C. Winters are relatively mild, with daytime highs near 10–12°C and nighttime lows around 3–6°C, though the strong sea breeze can make it feel colder than the actual temperature. Snow is rare, and skies are often clear in winter, while summers tend to be mostly cloudy.
Rainfall is significant throughout the year, with an annual total around 2,189 mm. The wettest months are June, July, and September, each receiving over 200 mm of rain, while December is drier with about 90 mm. Atami experiences approximately 9–19 rainy days per month, with the highest frequency in summer and early autumn. The swimming season lasts from June to November, when sea temperatures remain above 20°C, peaking at 26–27°C in August and September. Sunshine hours and daylight length vary, with the longest days in summer and shorter, but often clear, days in winter. Winds are generally moderate but can feel brisk, especially from autumn to spring.
| Average climate data for Atami, Japan | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°F) | 47 | 48 | 53 | 60 | 69 | 73 | 80 | 83 | 77 | 69 | 60 | 51 | 83 |
| Average minimum temperature (°F) | 37 | 38 | 43 | 50 | 58 | 64 | 72 | 74 | 68 | 60 | 52 | 42 | 37 |
| Average precipitation (inch) | 2 | 2 | 4 | 5 | 4 | 5 | 6 | 3 | 6 | 6 | 3 | 2 | 49 |
| Average rainfall days (days) | 9 | 12 | 16 | 16 | 14 | 18 | 19 | 17 | 17 | 16 | 13 | 10 | 175 |
| Average snowfall (inch) | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Average snowfall days (days) | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
| Average relative humidity (%) | 67 | 71 | 72 | 74 | 77 | 83 | 86 | 80 | 81 | 78 | 75 | 70 | 76 |
| Average wind speed (mph) | 9 | 9 | 9 | 9 | 8 | 7 | 8 | 7 | 8 | 9 | 8 | 9 | 8 |
| Average water temperature (°F) | 61 | 59 | 60 | 63 | 67 | 71 | 77 | 79 | 79 | 74 | 70 | 65 | 69 |
| Average daily daylight hours (h) | 10 | 10 | 12 | 13 | 14 | 14 | 14 | 13 | 12 | 11 | 10 | 9 | 12 |
| Average daily sunshine hours (h) | 6 | 5 | 6 | 8 | 9 | 8 | 9 | 10 | 8 | 6 | 5 | 6 | 7 |
| Average cloud coverage (%) | 28 | 42 | 45 | 43 | 38 | 47 | 46 | 36 | 43 | 44 | 38 | 30 | 40 |
| Average UV index | 2 | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 5 | 5 | 4 | 3 | 4 |
The best times to visit Atami are early spring (March to May) and late autumn (October to November). These seasons offer mild, comfortable weather, lower humidity, and vibrant cherry blossoms or autumn foliage. Outdoor sightseeing, hot springs, and local festivals are especially enjoyable during these periods, with fewer crowds than in peak summer.
The least favorable time to visit Atami is from June to September, when the city experiences its rainy season and peak humidity. Heavy rainfall, frequent cloudy days, and the risk of typhoons can disrupt outdoor plans and make sightseeing or beach activities less pleasant.
Atami has a humid subtropical climate with warm, humid summers and mild, breezy winters. Rainfall is abundant year-round, and the area enjoys lush greenery and a long swimming season.
The rainy season in Atami typically occurs from June to July, with September also being very wet due to typhoons. These months see the heaviest rainfall and highest humidity.
Snowfall in Atami is rare. Winters are mild, with average lows around 3°C and highs near 10–12°C, but strong sea breezes can make it feel colder.
Summer temperatures in Atami range from 20°C at night to 30°C during the day. Humidity is high, and the weather can feel oppressive, especially in July and August.
The best months for swimming are from June to November, when sea temperatures are above 20°C and reach their peak of 26–27°C in August and September.
Yes, Atami hosts the Sea Fireworks Festival several times a year and the Plum Blossom Festival from late January to March. Early cherry blossoms also bloom from late January to mid-February.
Winds in Atami are generally moderate but can feel brisk, especially from autumn to spring. The sea breeze can make winter days feel colder than the actual temperature.
The warmest month, with the highest average maximum temperature, is August (83.5 °F). The month with the lowest average maximum temperature is January (47.1 °F). Overall, the average maximum temperature over the whole year is 64.4 °F.
The month with the highest average minimum temperature is August (74.1 °F). The coldest month, with the lowest average minimum temperature, is January (36.9 °F). Overall, the average minimum temperature over the whole year is 54.8 °F.
The month with the highest average water temperature is August (79 °F). The month with the lowest average water temperature is February (59.4 °F). Overall, the average water temperature over the whole year is 68.7 °F.
The wettest month, with the highest amount of precipitation, is July (6.4 inch). The driest month, with the least amount of precipitation, is January (2.1 inch). Over the whole year there are 48.6 inch of rainfall on average.
The month with the most days of rain is July (18.7 days). The month with the fewest days of rain is January (8.6 days). Over the whole year there are 175.3 days of rain on average.
The month with the most snowfall is February (1.1 inch). The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0 inch). Over the whole year there are 1.3 inch of snowfall on average.
The month with the most days of snowfall is February (1.2 days). The month with the fewest days of snowfall is September (0 days). Over the whole year there are 2.7 days of snowfall on average.
The month with the highest average relative humidity is July (85.9 %). The month with the lowest average relative humidity is January (66.9 %). The overall average relative humidity over the whole year is 76.2 %.
The windiest month, with the highest average wind speed, is March (9.3 mph). The calmest month, with the lowest average wind speed, is August (7.2 mph). The overall average wind speed over the whole year is 8.3 mph.
The month with the cloudiest skies, so the highest cloud coverage, is June (46.9 %). The month with the clearest skies, so the lowest cloud coverage, is January (28.3 %). Over the whole year there is an average cloud coverage of 40.1 %.
The month with the longest days, so the most daylight, is June (Average daylight: 14 h). The month with the shortest days, so the least daylight, is December (Average daylight: 9.1 h). Over the whole year there are 11.9 h of daylight per day on average.
The month with the most sunshine per day is August (Average sunshine: 10 h). The month with the least sunshine per day is November (Average sunshine: 5 h). Over the whole year there are 7.2 h of sunlight per day on average.
The months with the highest average UV index are June, July and August (UV index: 6). The months with the lowest average UV index are January and February (UV index: 2). Over the whole year the average UV index is 4.2.
