Surf Forecasts:
Tengan surf forecast from 14 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 6PM (local time) - 1.5ft (0.4m), 9s period, ENE swell with 26 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 0.4m 9s and forecast to arrive on Wednesday (Aug 19) at 6PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 8s period and expected on Saturday (Aug 15) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Wed 19th Aug) | 1.5ft (0.4m) 9s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the Tengan area. Gotta be straight with you – it’s a tough stretch ahead.
Right from the off, the whole 16-day window is a bit of a heartbreaker. The Tengan reef is just not getting the love it needs. We kick off on Friday the 14th of August with a tiny 1ft ripple from the north, and the energy reading is a weak 26. The water’s 84°F which is pretty normal for this time of year, but the wave quality is flat-out poor. That sets the tone for the entire first week. It’s a real grind. From the 14th right through to the early hours of the 23rd of August, you’re looking at nothing but tiny ankle-snappers at best, with onshore breezes messing things up from the east and southeast most days. It’s just not worth paddling out for the locals. The crowds at Tengan are sometimes an issue, but with this surf, the lineup will be empty anyway.
There is a glimmer, and it shows up right at the tail end of the period. We’re talking about Sunday the 23rd of August. Suddenly, on Sunday afternoon, the energy jumps up to 103 – that’s moderate energy on the scale, a real change from the dribble before it. We get a clean 1ft swell coming from the ESE with a very long period of 16 seconds. That’s proper groundswell energy, and the wind is clean off the land from the NW, so the place will be looking tidy. For a reef like Tengan, that long-period swell is a beautiful thing, shaping up nicely. This run of cleaner, slightly better surf carries through Monday the 24th of August as well, with similar 2ft, 13-second ESE swell and clean cross-off winds, giving us moderate energy readings in the 130s. It’s the best we’re going to get, but realistically, these are still small, very ordinary conditions.
After that brief pulse, it dribbles away again. By Tuesday the 25th, the energy drops back down under 100, and we’re back to poor to ordinary conditions for the rest of the window. The 26th and 27th have a small 2-2ft E swell with offshore winds, but the energy is on the weaker side of moderate (100 – 106). It’s surfable, but nothing to write home about, and by the 28th and 29th, we’re back to tiny, weak, and messy. The wind swings to a stronger SSW-SW, blowing cross-off but the swell is gone.
To be honest, if you’re an absolute beginner, the tiny stuff from the 23rd to 27th might be okay, but the whole period is a bust for any surfer with a bit of experience. The only true standout is that small but clean window from the 23rd to the 24th of August. Mark that Sunday afternoon and Monday morning in your head – it’s the only time the conditions line up for a proper cruise.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Sat afternoon. Warm (max 29°C on Fri morning, min 26°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Wed afternoon, min 26°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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) | N 7 | ENE 10 | SW 9 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | NE 9 | NE 8 | ENE 8 |
Wave Graph | |||||||||||||||||||||
16 | 9 | 0 | 23 | 23 | 20 | 20 | 20 | 19 | 20 | 20 | 19 | 18 | 17 | 16 | 16 | 16 | 15 | 19 | 18 | 6 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-on | glassy | on | cross-on | cross-on | on | cross-on | on | on | on | on | on | on | cross-on | on | on | cross-on | glassy | glassy |
High Tide | 8:11PM2.17m | 7:59AM2.21m | 8:39PM2.15m | 8:41AM2.10m | 9:05PM2.12m | 9:22AM1.96m | 9:29PM2.06m | 10:05AM1.80m | 9:55PM1.99m | 10:54AM1.63m | 10:22PM1.90m | 12:02PM1.49m | 10:56PM1.79m | ||||||||
Low Tide | 1:49PM0.19m | 2:04AM0.69m | 2:22PM0.31m | 2:42AM0.63m | 2:52PM0.48m | 3:19AM0.60m | 3:21PM0.66m | 3:57AM0.62m | 3:48PM0.85m | 4:38AM0.67m | 4:16PM1.03m | 5:27AM0.75m | 4:49PM1.21m | ||||||||
5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
— | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | |
mm | — | — | 1 | — | 3 | 3 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 29 | 28 | 29 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 28 | 28 | 27 |
Feels °C | 34 | 33 | 33 | 34 | 34 | 30 | 31 | 30 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 31 | 30 | 32 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SW 9 | SSW 8 | SSW 8 | SSW 8 | SW 8 | SSW 8 | SW 9 | SW 9 | SW 8 | SW 9 | SW 9 | SSW 9 | SSW 9 | SW 8 | SW 8 | ENE 9 | NE 9 | S 9 | S 9 |
113 | 78 | 59 | 78 | 52 | 55 | 70 | 56 | 64 | 79 | 72 | 83 | 64 | 52 | 49 | 24 | 11 | 15 | 19 | 25 | 40 | |
Swell 2 Height (m) Direction Period (s) | N 7 | N 6 | S 8 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | SW 9 | S 9 | NE 8 | SW 10 |
16 | 7 | 21 | 23 | 23 | 20 | 20 | 20 | 19 | 20 | 20 | 19 | 18 | 17 | 16 | 16 | 16 | 12 | 25 | 18 | 15 | |
Swell 3 Height (m) Direction Period (s) | ENE 10 | ENE 10 | W 6 | W 5 | SSE 8 | W 6 | W 6 | W 6 | S 7 | S 8 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | S 9 | S 8 | S 8 | SW 9 | SW 9 | ENE 8 |
10 | 9 | 7 | 2 | 14 | 3 | 3 | 2 | 4 | 5 | 4 | 4 | 4 | 4 | 4 | 13 | 11 | 10 | 12 | 12 | 6 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | ESE 4 | ESE 5 | ESE 3 | SE 4 | SE 5 | ESE 5 | ESE 4 | E 3 | ESE 5 | E 4 | E 5 | E 5 | — | — | — | — |
— | — | — | — | — | 4 | 15 | 7 | 16 | 12 | 9 | 12 | 5 | 9 | 7 | 8 | 8 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 27 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 13 | 12 | 647 | 647 | 28 | 12 | 12 | 12 |
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.











