Surf Forecasts:
Tengan surf forecast from 28 Aug 2026:
- Best quality surf: Thursday 3 Sep, 6PM (local time) - 4ft (1.2m), 11s period, E swell with offshore winds.
- Most powerful swell: Monday 31 Aug, 9PM (local time) - 10ft (3.0m), 9s period, ESE swell with 1,490 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 3PM (local time) - 3.5ft (1.0m), 9s period with E swell.
Best Forecast Surf Conditions for Tengan this week:
The surf forecast for Tengan over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 03) at 3PM. The primary swell is predicted to be 1.0m and 9s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Tengan in the next 16 days are 3.0m 9s and forecast to arrive on Monday (Aug 31) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 10s period and expected on Wednesday (Sep 02) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Thu 3rd Sep) | 3.5ft (1.0m) 9s |
| Best Surf | 6PM (Thu 3rd Sep) | 4ft (1.2m) 11s |
| Most Powerful | 9PM (Mon 31st Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright, let’s get real about Tengan. It’s been a rough run, and honestly, looking at the next 16 days, there’s hardly a moment where I’d paddle out with any real hope. This reef break takes a northeast swell best, but the wind just won’t play ball. The water’s sitting at 83°, which is pretty much spot on for this time of year — nothing unusual there.
We kick things off from August 28th, and straight away it’s a mess. Cross-onshore winds from the southeast at 19 mph are making a lumpy, choppy mess out of a weak 5ft swell with a short, crumbly period of 7 seconds. The combined energy is only 170 — weak. Not worth a second look. This trend carries right through the weekend and into the start of September. On the 31st, we see the swell jumping to 8ft to 10ft, but it’s accompanied by a risk of thunderstorms and howling onshore winds around 28 mph. Combined energy hits 1342, which is strong, but it’s just a blown-out, dangerous wall of whitewater. Only for the kamikaze crew, if even them.
We get a slight teaser on September 3rd — Thursday afternoon sees a shift to a light offshore wind from the west-southwest at 16 mph. The swell is tiny, barely 3ft, and the period is a modest 9 seconds. The wave comment finally says “surfable waves but very ordinary conditions” with a score that’s basically a 1 out of 10. It’s clean-ish, but there’s just no power (energy only 171). Honestly, you’d be scratching for a wave.
Now here’s the only real standout in the whole 16-day window: Friday morning, September 4th. The wind drops to glassy — literally 3 mph from the west-southwest — and the water goes flat calm. Swell sits at 4ft from the east-southeast with a 10-second period, giving a combined energy of 306. That’s moderate energy, and with glassy conditions, Tengan might actually have a few clean, lined-up waves for a few hours. The direction is a little off the optimum, but when it’s that clean, you take what you can get. This is the morning to try, but be warned: the afternoon goes light cross-onshore and marginal again.
After that, it’s back to the usual story. From September 5th onward, we’ve got a solid week of onshore winds, thunderstorms, and messy conditions. The 6th and 7th see swell pumping between 7ft and 8ft with strong energy (over 1000), but it’s all cross-onshore and ugly. Then we fade into a long lull from the 8th through to the 11th — tiny, weak swells under 3ft, short periods, and still messy wind. September 12th throws a curveball: a very long period groundswell of 18 seconds from the east, hitting 5ft to 6ft, with combined energy through the roof at 2345. That’s a lot of power. But with near gale to severe gale onshore winds (37 to 50 mph), it’s completely unsurfable. That much energy and that much wind just turns it into a washing machine. For a reef break like Tengan, it could be dangerous as hell.
Overall, it’s a tough stretch. There’s a big gap of zero recommendations from the 28th all the way to the 3rd, then a single clean window on the morning of the 4th, then another gap of poor conditions for the rest of the run. If you’re set on Tengan, keep your eyes on that Friday the 4th morning, and don’t bother with the rest.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Mon morning. Warm (max 29°C on Fri afternoon, min 27°C on Fri night). Mainly strong winds. | Days 5-7 Weather SummaryHeavy rain (total 32mm), heaviest during Mon night. Warm (max 29°C on Tue afternoon, min 27°C on Mon afternoon). Winds decreasing (strong winds from the E on Mon afternoon, moderate winds from the SSW by Wed night). | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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) | ESE 7 | ESE 7 | ESE 8 | ESE 7 | ESE 7 | E 5 | E 9 | ESE 10 | E 9 | E 9 | ESE 9 | E 8 | ESE 8 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 10 |
Wave Graph | ||||||||||||||||||||
170 | 243 | 187 | 131 | 102 | 89 | 455 | 555 | 1153 | 1342 | 1377 | 301 | 201 | 332 | 264 | 194 | 177 | 230 | 171 | 240 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | off | cross-off |
High Tide | 7:16PM2.11m | 6:59AM2.19m | 7:39PM2.15m | 7:35AM2.18m | 8:04PM2.16m | 8:13AM2.12m | 8:29PM2.15m | 8:54AM2.02m | 8:56PM2.11m | 9:40AM1.89m | 9:26PM2.04m | 10:34AM1.74m | 10:03PM1.96m | |||||||
Low Tide | 1:06AM0.68m | 1:22PM0.30m | 1:38AM0.57m | 1:49PM0.37m | 2:12AM0.50m | 2:18PM0.49m | 2:47AM0.45m | 2:48PM0.65m | 3:26AM0.45m | 3:21PM0.83m | 4:12AM0.50m | 3:57PM1.02m | ||||||||
— | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | |
mm | — | — | — | — | — | — | — | 5 | 7 | 7 | 13 | 3 | 1 | 4 | 2 | 1 | — | 1 | 1 | 1 |
Temp °C | 29 | 28 | 28 | 28 | 27 | 29 | 29 | 27 | 27 | 27 | 27 | 28 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 27 |
Feels °C | 30 | 28 | 29 | 29 | 28 | 29 | 29 | 26 | 24 | 25 | 26 | 29 | 30 | 28 | 30 | 31 | 30 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | W 9 | SW 9 | SSW 9 | SSW 9 | SW 9 | S 9 | S 9 | ESE 10 | SSW 9 | SSW 10 | SW 10 | S 9 | S 9 | SSW 10 | SSW 9 | SW 10 | WSW 10 | W 9 | W 8 | WNW 9 |
164 | 65 | 110 | 127 | 61 | 56 | 42 | 555 | 16 | 19 | 17 | 196 | 157 | 424 | 378 | 769 | 653 | 292 | 186 | 217 | |
Swell 2 Height (m) Direction Period (s) | SW 8 | W 8 | W 8 | W 8 | S 9 | SW 9 | SW 9 | SSW 9 | SW 9 | SW 10 | — | SW 10 | S 11 | NNE 6 | E 10 | E 10 | SW 10 | E 10 | E 9 | E 10 |
58 | 50 | 33 | 20 | 40 | 40 | 27 | 25 | 13 | 14 | — | 34 | 59 | 4 | 264 | 194 | 234 | 230 | 171 | 240 | |
Swell 3 Height (m) Direction Period (s) | S 8 | W 10 | ENE 13 | ENE 13 | ENE 12 | W 6 | — | SW 9 | SSW 11 | — | — | NNE 6 | SW 10 | — | SW 10 | — | E 10 | SW 10 | S 10 | SSW 10 |
4 | 18 | 17 | 17 | 15 | 1 | — | 28 | 12 | — | — | 7 | 44 | — | 16 | — | 177 | 167 | 127 | 154 | |
Wind waves Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 8 | ESE 7 | ESE 7 | E 5 | E 9 | ENE 6 | E 9 | E 9 | ESE 9 | E 8 | ESE 8 | E 10 | SSE 5 | SSE 5 | — | — | — | — |
170 | 243 | 187 | 131 | 102 | 89 | 455 | 108 | 1153 | 1342 | 1377 | 301 | 201 | 332 | 30 | 61 | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 840 | 613 | 621 | 621 | 13 | 647 | 805 | 631 | 757 | 805 | 745 | 745 | 840 | 745 | 745 | 745 | 621 | 621 | 0 | 0 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the Tengan Surf forecast
The above surf forecast table for Tengan provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Tengan can be found by selecting the local surf guide option on the grey menu. Our Tengan 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 (Tengan) 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 Tengan 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.
Tengan is 5 km (3 miles) from the city of Ishikawa. If you plan a holiday in Okinawa, look for hotels and other accommodation in Ishikawa. Ishikawa has rooms for a wide range of budgets as well as car hire and transport links.











