Surf Forecasts:
Nagahama surf forecast from 18 Aug 2026:
- Most powerful swell: Wednesday 26 Aug, 9AM (local time) - 7ft (2.1m), 16s period, S swell with 2,123 kJ wave energy.
Best Forecast Surf Conditions for Nagahama this week:
The most powerful waves expected at Nagahama in the next 16 days are 2.1m 16s and forecast to arrive on Wednesday (Aug 26) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 11s period and expected on Friday (Aug 21) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9AM (Wed 26th Aug) | 7ft (2.1m) 16s |
Table - best surf conditions forecast for Nagahama over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Fri night. Warm (max 27°C on Wed afternoon, min 25°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat night. Warm (max 27°C on Sat afternoon, min 24°C on Sat night). Winds increasing (light winds from the SSW on Sun night, fresh winds from the S by Mon afternoon). | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SE 6 | SSE 6 | SSW 8 | SSE 6 | SSW 9 | S 10 | SSW 9 | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SW 9 | SSW 9 | SW 9 | SSE 15 | SSE 14 | SSE 16 | SSE 14 | SSE 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6 | 4 | 6 | 4 | 8 | 8 | 27 | 101 | 34 | 32 | 32 | 32 | 26 | 20 | 26 | 27 | 191 | 286 | 938 | 1121 | 811 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-on | glassy | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | off | cross | cross-on | cross-on | cross-on | on | on | cross-on | on |
High Tide | 8:01PM1.48m | 9:27AM1.19m | 8:27PM1.44m | 11:35AM1.10m | 8:59PM1.38m | 10:01PM1.32m | 4:01PM1.31m | 00:24AM1.29m | 4:15PM1.40m | 2:01AM1.36m | 4:35PM1.47m | ||||||||||
Low Tide | 1:55PM0.78m | 2:56AM0.51m | 2:16PM0.93m | 4:02AM0.54m | 2:23PM1.07m | 5:39AM0.54m | 7:23AM0.48m | 8:27PM1.21m | 8:33AM0.38m | 9:20PM1.11m | 9:22AM0.29m | 9:52PM0.99m | |||||||||
 | |  |  |  |  | | |  | | | | | | | | | | | | | |
 | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — |
 | — | 6:25 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:19 | — |
mm | — | — | — | — | — | — | — | — | 1 | — | — | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 26 | 26 | 27 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 26 |
Feels °C | 30 | 29 | 28 | 29 | 29 | 29 | 28 | 26 | 26 | 29 | 29 | 30 | 29 | 29 | 30 | 30 | 27 | 27 | 27 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSW 8 | SSW 9 | SE 11 | SSW 9 | SSW 9 | SSW 9 | SSW 4 | SSW 9 | SW 9 | SSW 9 | SW 9 | SSE 15 | SSE 14 | SSE 16 | SSE 14 | SSE 14 |
| kJ | 6 | 4 | 3 | 3 | 3 | 6 | 27 | 4 | 34 | 32 | 32 | 5 | 26 | 20 | 26 | 20 | 191 | 286 | 938 | 1121 | 811 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SSW 9 | S 10 | SE 11 | S 9 | SE 10 | S 4 | SE 10 | SSW 9 | SE 10 | SSE 4 | SSE 10 | SE 10 | SW 10 | SSE 18 | SW 10 | SSW 10 | S 16 |
| kJ | 4 | 4 | 4 | 4 | 8 | 8 | 4 | 2 | 4 | 4 | 4 | 32 | 4 | 2 | 10 | 17 | 87 | 257 | 17 | 10 | 651 |
Swell 3 Height (m) Direction Period (s) | SSW 8 | SW 8 | SSW 8 | SW 8 | SE 11 | SE 11 | SE 5 | SE 5 | S 9 | SE 10 | SE 11 | SE 10 | SE 11 | SE 12 | S 16 | SSE 17 | E 12 | SW 11 | ESE 14 | — | SSW 10 |
| kJ | 6 | 3 | 6 | 2 | 4 | 4 | 4 | 1 | 2 | 4 | 5 | 4 | 5 | 5 | 5 | 27 | 11 | 114 | 62 | — | 11 |
Wind waves Height (m) Direction Period (s) | — | S 2 | — | — | SSE 2 | SSE 5 | S 3 | S 9 | SSW 3 | S 5 | S 3 | SW 3 | ENE 2 | — | — | — | SSW 10 | SSW 11 | — | SW 10 | — |
| kJ | — | 1 | — | — | 1 | 6 | 1 | 101 | 7 | 11 | 8 | 4 | 1 | — | — | — | 38 | 45 | — | 85 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 72 | 72 | 43 | 8 | 72 | 72 | 72 | 72 | 73 | 11 | 74 | 11 | 8 | 8 | 8 | 11 | 72 | 24 | 24 | 492 | 24 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nagahama surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Nagahama Surf forecast
The above surf forecast table for Nagahama provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nagahama can be found by selecting the local surf guide option on the grey menu. Our Nagahama surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Nagahama) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Nagahama may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Nagahama is 6 km (4 miles) from Miura. If you plan a holiday in Kanagawa, look for hotels and other accommodation in Miura. Miura has rooms for a wide range of budgets as well as car hire and transport links.
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