Seasonal ranking
Warmest sea temperature in Japan in January
Where the sea is warmest across Japan during January, ranked by long-term monthly average water temperature. Nishihama Beach (Okinawa, Japan) tops the list at around 26°C. Open any spot for today's live water temperature and a 7-day swim forecast.
- 1Nishihama BeachOkinawa · Japan · Philippine SeaWarm — comfortable swimming26°CJanuary average
- 2Sunayama BeachOkinawa · Japan · Philippine SeaWarm — comfortable swimming26°CJanuary average
- 3Kondoi BeachOkinawa · Japan · East China SeaWarm — comfortable swimming24°CJanuary average
- 4Kondoi Beach TaketomiOkinawa · Japan · East China SeaWarm — comfortable swimming24°CJanuary average
- 5Yuigahama BeachKanagawa · Japan · Pacific OceanMild — fine for a swim, cool at first20°CJanuary average
- 6Shirahama BeachWakayama · Japan · Pacific OceanMild — fine for a swim, cool at first20°CJanuary average
- 7Zushi BeachKanagawa · Japan · Pacific OceanMild — fine for a swim, cool at first20°CJanuary average
- 8Enoshima BeachKanagawa · Japan · Pacific OceanMild — fine for a swim, cool at first20°CJanuary average
- 9Kabira BayOkinawa · Japan · Pacific OceanMild — fine for a swim, cool at first20°CJanuary average
- 10Emerald Beach OkinawaOkinawa · Japan · East China SeaMild — fine for a swim, cool at first18°CJanuary average
- 11Naminoue BeachOkinawa · Japan · East China SeaMild — fine for a swim, cool at first18°CJanuary average
- 12Manza BeachOkinawa · Japan · East China SeaMild — fine for a swim, cool at first18°CJanuary average
- 13Mibaru BeachOkinawa · Japan · Pacific OceanMild — fine for a swim, cool at first18°CJanuary average
- 14Furuzamami BeachOkinawa · Japan · Pacific OceanMild — fine for a swim, cool at first18°CJanuary average
- 15Katsurahama BeachKochi · Japan · Pacific OceanMild — fine for a swim, cool at first18°CJanuary average
- 16Nigishima BeachMie · Japan · Pacific OceanMild — fine for a swim, cool at first18°CJanuary average
- 17Ibusuki BeachKagoshima · Japan · Pacific OceanMild — fine for a swim, cool at first18°CJanuary average
- 18Aoshima BeachMiyazaki · Japan · Pacific OceanMild — fine for a swim, cool at first18°CJanuary average
- 19Suma BeachHyogo · Japan · Pacific OceanMild — fine for a swim, cool at first18°CJanuary average
- 20Shirahama Beach IzuShizuoka · Japan · Pacific OceanMild — fine for a swim, cool at first18°CJanuary average
- 21Kujukuri BeachChiba · Japan · Pacific OceanCold — wetsuit strongly recommended13°CJanuary average
- 22Onjuku BeachChiba · Japan · Pacific OceanCold — wetsuit strongly recommended13°CJanuary average
- 23Onjuku BeachChiba · Japan · Pacific OceanCold — wetsuit strongly recommended13°CJanuary average
Warmest sea in January elsewhere
Japan in January — frequently asked questions
- Where is the sea warmest in Japan in January?
- Nishihama Beach in Japan has the warmest sea in Japan in January, averaging about 26.0 °C. Sunayama Beach (26.0 °C) and Kondoi Beach follow close behind.
- How many beaches in Japan are warm enough to swim in January?
- 4 of the top 23 ranked beaches in Japan average 22 °C or more in January, which most swimmers find comfortable without a wetsuit.
- How are these January sea temperatures calculated?
- Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical January rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.
Explore every sea temperature page
Jump straight to a country, coastal region, city, seasonal ranking or comparison.
Sea temperature by country
Coastal region hubs
Water temperature today by city
Warmest sea in August
Warmest sea month by month (Europe)
Popular beach comparisons
Platja d'Aro vs Platja de Sant PolCala Sa Tuna vs AiguablavaCala Pola vs Platja GranCala Montjoi vs Platja de PalsPlatja de Pals vs Cala Sa TunaCala Estreta vs Platja d'AroPlatja de Lloret vs Platja GranPlatja de la Pineda vs Salou LevantePlatja Llarga vs Platja del MiracleCambrils Playa vs Salou LevantePlaya del Postiguet vs Playa de San JuanPlaya de San Juan vs Playa del Postiguet SurPlaya de Levante vs Playa de PonienteCala Finestrat vs Playa de PonientePlaya del Albir vs Playa de LevantePlaya de la Fossa vs Cala BaladrarCala el Portet vs Cala del MoraigPlaya del Arenal vs Cala GranadellaCompare any two beaches →
Keep exploring
Live sea temperature mapEvery coast, updated hourlyWarmest beaches todayLive ranking right nowCompare two beachesSide-by-side swim conditionsLake water temperaturesFreshwater swimming spotsRivers & swimming holesWild swimming conditionsAll destinationsBrowse by country & region