Surf Forecasts:
Nichinan surf forecast from 1 Sep 2026:
- Best quality surf: Friday 4 Sep, 9AM (local time) - 10ft (3.0m), 8s period, E swell with cross-shore winds.
- Most powerful swell: Saturday 5 Sep, 6AM (local time) - 16ft (5.0m), 10s period, E swell with 4,339 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 9AM (local time) - 10ft (3.0m), 8s period with E swell.
Best Forecast Surf Conditions for Nichinan this week:
The surf forecast for Nichinan over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 04) at 9AM. The primary swell is predicted to be 3.0m and 8s period with a secondary swell of 1.6m and 9s. Another secondary swell of 0.1m and 16s is also forecast. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Nichinan in the next 16 days are 5.0m 10s and forecast to arrive on Saturday (Sep 05) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 7s period and expected on Tuesday (Sep 08) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 4th Sep) | 10ft (3.0m) 8s |
| Best Surf | 9AM (Fri 4th Sep) | 10ft (3.0m) 8s |
| Most Powerful | 6AM (Sat 5th Sep) | 16ft (5.0m) 10s |
Table - best surf conditions forecast for Nichinan over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s happening on our local stretch. It’s a slow start, but there’s some serious size brewing for the second week.
For the first week, honestly, it’s mostly a mess. The wind is cross or cross-off, but the swell is all over the place and conditions are lumpy and marginal. The water temp is around 84°F, which is pretty normal for this time of year.
The first real chance of anything good is on Friday, September 11th, in the morning. We’ve got glassy conditions with a 6.9ft swell from the NE, period of 7 seconds, and combined energy of 618—moderate energy. The wind is glassy, so it’ll be clean, but that short period means the waves will be a bit crumbly. Good for a dawn paddle.
Then things get heavy. Monday, September 15th brings a big jump. Tuesday morning has a 9.8ft swell from the E with a 10-second period, energy of 4088—strong stuff. That’s solid groundswell, but with this break being a river mouth, it’s going to be pushing big. The wind is light and cross, so it could be clean, but it’s only for experienced surfers. Tuesday afternoon is even bigger: 14.8ft from the E with a 14-second period and energy of 9255. That’s very strong and very long period, which will be a handful. Might be better at a point break.
Wednesday, September 16th is another big one: 13.1ft from the E, 13-second period, and energy of 5943. Glassy in the morning—if you’re an expert, that’s the time.
The standout for me is Thursday, September 17th, in the morning. Glassy conditions again, 8.2ft from the E with a 12-second period, and energy of 2165. That’s a solid, well-shaped groundswell with clean conditions. It’s big enough to be fun for experienced surfers but not out of control. The combined energy is moderate-to-strong, and with that long period, the waves will have plenty of punch. This is the best on offer.
If you’re a beginner, you’re out of luck for the whole 16 days. For everyone else, the 11th is a fun, clean session, but the real gold is on the 17th.
Stay safe out there.
Short Range ForecastHeavy rain (total 235mm), heaviest during Fri morning. Warm (max 29°C on Wed morning, min 24°C on Thu morning). Winds increasing (light winds from the ENE on Wed night, strong winds from the ENE by Fri night). | Days 4-6 Weather SummaryHeavy rain (total 169mm), heaviest during Sat night. Warm (max 30°C on Mon afternoon, min 25°C on Sat morning). Winds decreasing (strong winds from the NE on Sat morning, light winds from the N by Mon night). | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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 9 | SE 9 | SE 8 | SE 10 | SSE 10 | SSE 10 | E 8 | S 9 | E 9 | E 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | ENE 9 | ESE 10 | E 11 | E 11 | E 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 491 | 370 | 408 | 625 | 1088 | 942 | 971 | 528 | 2833 | 3484 | 1175 | 589 | 414 | 432 | 794 | 916 | 499 | 1001 | 2465 | 1944 | 1175 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-off | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off |
High Tide | 9:11AM1.93m | 8:57PM2.06m | 10:06AM1.79m | 9:29PM1.98m | 11:25AM1.65m | 10:12PM1.88m | 1:42PM1.60m | 11:27PM1.76m | 3:44PM1.71m | 1:35AM1.73m | 4:34PM1.84m | 3:13AM1.82m | 5:09PM1.94m | ||||||||
Low Tide | 2:52PM0.92m | 3:39AM0.52m | 3:28PM1.13m | 4:36AM0.59m | 4:13PM1.33m | 5:55AM0.65m | 5:48PM1.49m | 7:39AM0.63m | 8:43PM1.47m | 9:09AM0.52m | 10:01PM1.31m | 10:11AM0.39m | 10:46PM1.12m | ||||||||
 |  |  |  |  |  |  | |  | | | | | | |  | |  | | |  | |
 | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — |
 | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:30 | — | — | 6:30 | — |
mm | — | — | 9 | 13 | 5 | 19 | 64 | 50 | 75 | 16 | 44 | 54 | 11 | 33 | 11 | — | — | — | — | — | — |
Temp °C | 29 | 29 | 27 | 24 | 25 | 26 | 26 | 25 | 24 | 25 | 26 | 27 | 27 | 27 | 25 | 29 | 30 | 27 | 29 | 28 | 27 |
Feels °C | 31 | 31 | 30 | 23 | 23 | 27 | 26 | 23 | 19 | 22 | 25 | 28 | 28 | 28 | 21 | 28 | 30 | 26 | 27 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | E 11 | SE 10 | SSE 10 | SSE 10 | S 9 | S 9 | S 10 | S 9 | ENE 9 | ENE 8 | S 7 | ENE 8 | E 9 | E 9 | SE 8 | ESE 10 | E 11 | E 11 | E 10 |
| kJ | 491 | 370 | 149 | 625 | 1088 | 942 | 417 | 528 | 1249 | 542 | 1175 | 589 | 94 | 432 | 794 | 916 | 279 | 1001 | 2465 | 1944 | 1175 |
Swell 2 Height (m) Direction Period (s) | E 12 | E 11 | E 16 | E 10 | ENE 13 | SW 10 | E 16 | SE 8 | E 15 | S 9 | S 8 | SSE 7 | E 13 | S 8 | S 8 | S 8 | S 8 | S 8 | S 10 | S 9 | E 14 |
| kJ | 175 | 155 | 5 | 106 | 17 | 4 | 5 | 264 | 4 | 841 | 219 | 215 | 3 | 63 | 47 | 34 | 21 | 12 | 16 | 14 | 94 |
Swell 3 Height (m) Direction Period (s) | SW 10 | E 18 | S 10 | SW 10 | SW 10 | E 16 | E 16 | E 16 | — | — | SE 8 | E 13 | E 13 | SE 6 | — | SE 11 | SSW 8 | — | — | — | S 9 |
| kJ | 4 | 6 | 2 | 4 | 4 | 5 | 5 | 5 | — | — | 164 | 4 | 3 | 18 | — | 5 | 7 | — | — | — | 14 |
Wind waves Height (m) Direction Period (s) | — | ENE 6 | SE 8 | ENE 5 | NE 6 | ENE 7 | E 8 | ENE 8 | E 9 | E 10 | SE 7 | — | ENE 8 | SE 6 | — | — | ENE 9 | ENE 9 | NE 6 | NE 7 | NNE 6 |
| kJ | — | 4 | 408 | 80 | 296 | 529 | 971 | 403 | 2833 | 3484 | 318 | — | 414 | 43 | — | — | 499 | 508 | 341 | 271 | 186 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 27 | 27 | 27 | 141 | 303 | 99 | 27 | 27 | 650 | 303 | 308 | 303 | 27 | 27 | 308 | 27 | 27 | 25 | 27 | 27 | 27 |
Best forecast wave conditions in Kyu Shu | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Nichinan Surf forecast
The above surf forecast table for Nichinan provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nichinan can be found by selecting the local surf guide option on the grey menu. Our Nichinan 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 (Nichinan) 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 Nichinan 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.
Nichinan is 4 km (2 miles) from Nichinan. If you plan a holiday in Kyu Shu, look for hotels and other accommodation in Nichinan. Nichinan has rooms for a wide range of budgets as well as car hire and transport links.
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