Surf Forecasts:
Tengan surf forecast from 15 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 12PM (local time) - 5ft (1.5m), 8s period, E swell with 294 kJ wave energy.
Best Forecast Surf Conditions for Tengan this week:
The most powerful waves expected at Tengan in the next 16 days are 1.5m 8s and forecast to arrive on Wednesday (Aug 19) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 9s period and expected on Friday (Aug 21) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12PM (Wed 19th Aug) | 5ft (1.5m) 8s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright, let’s get real about Tengan. This spot is a reef break over on the NE side of things, and it’s inconsistent, so we’re not talking about a place that fires all the time. For the next week and a half, honestly, there’s not a whole lot to get excited about. The water is sitting at 84°F which is about average for this time of year, so no weirdness there.
Right now, from Saturday afternoon on the 15th right through to the end of the month, we’re staring down a long stretch of pretty ordinary conditions. Most days are looking at tiny swell, mostly under 3 ft, with a persistent onshore or cross-onshore wind from the east and southeast. The wind has a bit of kick to it too, up around 12-19 mph, so it’s going to be choppy and messy. The combined wave energy is weak, mostly under 100, sometimes hitting the low triple digits like 171 on the 20th afternoon, but the quality is still poor.
There’s a few days in the later part of the second week, around the 25th, where we get a bump in energy—743 energy—but the period is a massive 16 seconds. That’s a very long period groundswell. At a reef break like Tengan, that’s actually good news for shape, but the wind is still onshore and the cross-on chop will ruin it. The wave comment even says it’s marginal or poor. The 4 ft swell is there, but with those winds, it’s not a paddle session.
The best glimmer, and I mean a faint one, comes on the 29th and 30th. Afternoon on the 29th shows a shift: a light cross-offshore breeze from the NW at just 3 mph, with a small 2 ft swell from the NNW. That’s clean, but the energy is only 69, so it’s weak. Then Sunday the 30th afternoon, the wind is light and cross-off from the SW, swell from the ENE at 1 ft with a 13-second period, energy at 121. It’s surfable but very ordinary.
So here’s the deal: the whole 16-day window is mostly a write-off. There’s no standout day. If you’re desperate for a paddle, the 30th afternoon is your best shot, but keep expectations very low. For beginners, the 1 ft to 2 ft swell is safe, but the wind and chop are not friendly. For anyone else, it’s a skunk. Don’t hold your breath.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue morning. Warm (max 29°C on Mon morning, min 27°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 34mm), heaviest during Wed morning. Warm (max 29°C on Fri morning, min 27°C on Tue night). Mainly fresh winds. | ||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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) | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | E 4 | E 6 | E 6 | E 6 | ENE 8 | ENE 8 | E 8 | ESE 9 | ESE 8 | NNE 6 | N 6 | ESE 7 | N 5 |
Wave Graph | |||||||||||||||||||
20 | 20 | 20 | 19 | 20 | 19 | 22 | 18 | 75 | 100 | 251 | 264 | 100 | 88 | 101 | 3 | 2 | 17 | 2 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | on | on | on | on | on | on | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off |
High Tide | 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 | 2:22PM1.43m | 11:51PM1.67m | |||||||
Low Tide | 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 | 6:38AM0.83m | 5:48PM1.37m | |||||||
— | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | |
7:05 | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | |
mm | — | — | — | — | — | — | — | 2 | — | 2 | 5 | 6 | 4 | 3 | 3 | 7 | 1 | 3 | 5 |
Temp °C | 27 | 28 | 28 | 27 | 29 | 29 | 27 | 28 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 27 |
Feels °C | 31 | 31 | 29 | 29 | 31 | 31 | 29 | 29 | 28 | 28 | 27 | 27 | 31 | 32 | 30 | 30 | 31 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SW 8 | SW 8 | SW 9 | SW 9 | SW 9 | SSW 8 | E 6 | SW 8 | SW 9 | SW 9 | SSW 8 | NNE 5 | ESE 9 | ESE 8 | SSE 10 | S 9 | S 9 | S 9 |
55 | 70 | 69 | 61 | 64 | 59 | 62 | 18 | 25 | 21 | 12 | 13 | 17 | 88 | 101 | 295 | 287 | 162 | 129 | |
Swell 2 Height (m) Direction Period (s) | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | SW 9 | S 8 | S 8 | SSW 9 | SW 9 | S 10 | ENE 8 | S 10 | SW 9 | SW 10 | ESE 7 | SW 9 |
20 | 20 | 20 | 19 | 20 | 19 | 19 | 36 | 11 | 11 | 15 | 12 | 16 | 28 | 48 | 13 | 15 | 17 | 13 | |
Swell 3 Height (m) Direction Period (s) | W 6 | S 9 | W 8 | W 7 | W 6 | ESE 11 | SE 10 | S 8 | ENE 10 | ENE 9 | — | SW 9 | SW 8 | NNE 6 | NNE 6 | NNE 6 | N 6 | N 6 | N 5 |
3 | 14 | 5 | 8 | 3 | 11 | 4 | 20 | 9 | 8 | — | 3 | 11 | 11 | 7 | 3 | 2 | 2 | 2 | |
Wind waves Height (m) Direction Period (s) | ESE 4 | ESE 5 | ESE 5 | ESE 4 | SE 5 | ESE 5 | E 4 | — | E 6 | E 6 | ENE 8 | ENE 8 | E 8 | SSE 3 | SSE 3 | — | S 9 | SW 4 | SW 6 |
2 | 8 | 13 | 12 | 14 | 11 | 22 | — | 75 | 100 | 251 | 264 | 100 | 3 | 4 | — | 680 | 32 | 46 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 1009 | 12 | 13 | 1484 | 613 | 13 | 13 | 631 | 647 | 636 |
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.











