Weather in Hamamatsu in February
Japan · 20-year averages, February
Shoulder season. February is shoulder season in Hamamatsu — cheaper, quieter, and a genuine gamble. Highs sit at 11.3 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.
February ranks 12 of 12 — near the bottom of Hamamatsu's year. November is the month that works, and the swing between the two is 20 points, which is a different holiday rather than a slightly better one.
Rain on 8 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 11.3 °C the difference between a good day and a miserable one is entirely down to what you are wearing.
What the averages hide
Averages flatten a month, and this one hides a few things: the day barely swings — 3.8 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest February day reached 18.7 °C and the coldest night fell to 1.4 °C, and the wettest single day dropped 68 mm — roughly 76% of the month's rain in one day.
February is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest February on record still delivered 160 mm against 29 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 89 mm average is a reasonable planning figure, not a promise.
Wind sits around 24.6 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity is unremarkable at 73%.
How February sits in the year
Temperatures hold steady either side: 10.6 °C in January, 11.3 here, 13.7 in March. Nothing about the timing within the month matters much.
Daylight in February
10.9 hours of daylight, gaining 1 hours across the month. That is between Hamamatsu's extremes of 14.5 and 9.8 hours, so days are long enough not to constrain the plan.
Sea temperature
The sea sits at about 16.6 °C in February — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. The sea peaks at 27.3 °C in August and bottoms out at 16.6 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.
How busy it gets
Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.
Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.
February in Hamamatsu versus nearby
If Hamamatsu is one option among several, the nearby comparison is worth making. Kyoto is the weaker option in February — 2.6 °C cooler, 7 days more rain. Osaka is close enough to be a coin toss — within a degree on temperature, the same number of rain days.
So: February is a compromise. November is 20 points better and is what Hamamatsu is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.
Every month in Hamamatsu
| Month | High °C | Low °C | Rain days | Rain mm | Humidity % | Daylight h | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|
| January | 10.6 | 7.2 | 6 | 73 | 75 | 10.1 | 17.1 | 58 |
| February | 11.3 | 7.5 | 8 | 89 | 73 | 10.9 | 16.6 | 55 |
| March | 13.7 | 9.5 | 10 | 134 | 72 | 11.9 | 16.8 | 57 |
| April | 17.2 | 13.5 | 11 | 177 | 75 | 13 | 18.1 | 66 |
| May | 20.6 | 17.6 | 12 | 190 | 80 | 14 | 20 | 72 |
| June | 23.4 | 21.2 | 15 | 233 | 85 | 14.5 | 22.6 | 66 |
| July | 26.6 | 24.8 | 17 | 241 | 88 | 14.3 | 25.6 | 58 |
| August | 28.2 | 26.3 | 16 | 173 | 85 | 13.5 | 27.3 | 59 |
| September | 26.3 | 24.1 | 17 | 242 | 80 | 12.4 | 26.3 | 65 |
| October | 22.5 | 19.7 | 12 | 234 | 75 | 11.4 | 23.9 | 72 |
| November | 18 | 15 | 9 | 107 | 73 | 10.4 | 21.6 | 75 |
| December | 13.2 | 9.9 | 7 | 78 | 74 | 9.8 | 19.2 | 64 |
See all twelve months in Hamamatsu, or where else to go in February.
Planning the rest of the trip
- Flight time to Hamamatsu how long you are actually in the air
- Hamamatsu time zone and the difference from home
- Days until your trip count down to the departure date