
Surf Forecasts:
Tengan surf forecast from 4 Aug 2026:
- Best quality surf: Friday 7 Aug, 9AM (local time) - 23ft (7.0m), 12s period, N swell with cross-offshore winds.
- Most powerful swell: Friday 7 Aug, 9PM (local time) - 39ft (12.0m), 14s period, N swell with 56,421 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 9AM (local time) - 23ft (7.0m), 12s period with N 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 Friday (Aug 07) at 9AM. The primary swell is predicted to be 7.0m and 12s period with a secondary swell of 4.0m and 17s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Tengan in the next 16 days are 12.0m 14s and forecast to arrive on Friday (Aug 07) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 13.0m 14s period and expected on Sunday (Aug 09) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 7th Aug) | 23ft (7.0m) 12s |
| Best Surf | 9AM (Fri 7th Aug) | 23ft (7.0m) 12s |
| Most Powerful | 9PM (Fri 7th Aug) | 39ft (12.0m) 14s |
Table - best surf conditions forecast for Tengan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about Tengan.
Alright, let’s be straight with you. Tengan’s got a bit of a rough patch ahead. The first real surf worth paddling out for doesn’t show up until Wednesday, August 12th. Before that, we’ve got a solid week of either junk or flat or just plain dangerous conditions. From Tuesday, August 4th, right through to Tuesday, August 11th, it’s mostly a write-off. Early on, we get a building swell, but the wind is cross-on or cross-shore and choppy, or the swell gets way too big. By Friday, August 7th, the wave energy is absolutely pumping – we’re talking combined energy readings of 23,287 and 35,321 – but the swell is 23ft to 31ft. That’s heavy, expert-only territory if it even breaks right, and frankly, with a storm-force gale blowing, it’s more of a survival mission than a surf session. The whole weekend and into Monday, August 10th, is hammered by hurricane-force winds, with the swell still massive, and even though the wind is offshore, paddling out would be foolish. By Tuesday, August 11th, the swell collapses to 1ft with a weak 71 energy reading. So we’ve got a big gap of about 8 days with nothing for the average surfer.
Now, the good news. The window opens on Wednesday, August 12th. Wednesday morning sees a nice, clean 5ft swell from the northwest, with a period of 11 seconds. That’s a proper groundswell, which means shape and energy. The wind is a light offshore at 6 mph, so it’ll be glassy. The combined energy is a moderate 533. Wednesday afternoon turns even better. The wind goes to a slight offshore breeze, 3 mph, and the swell drops to 4ft from the northwest with a 10-second period. It’ll be clean, easy to paddle, and that’s a solid beginner-friendly wave. The water’s about 87°, which is a touch warmer than normal for this time of year.
The standout here is Wednesday, August 12th, both sessions. The morning session has a bit more size (5ft) and a longer period, which might give it a bit more punch at the reef, but the afternoon with the glassy offshore wind and 4ft is a very close second. It’s the best the forecast has to offer. Just keep in mind Tengan is an inconsistent spot, so when it’s on, you gotta be on it. Crowds are sometimes a factor here, so you might have some company.
After that, the swell fades fast. Thursday, August 13th, drops to 2ft, and from there it’s a long run of tiny, ankle-biters with weak energy readings (mostly under 100) and cross-offshore winds that keep it clean but small. There’s nothing worth chasing in the second week after the 12th. The 12th is your day.
Rusty
Short Range ForecastHeavy rain (total 29mm), heaviest during Fri morning. Warm (max 31°C on Tue afternoon, min 28°C on Tue night). Winds increasing (light winds from the ENE on Tue night, stormy winds from the NNW by Fri morning). | Days 5-7 Weather SummaryHeavy rain (total 1006mm), heaviest during Sat afternoon. Warm (max 29°C on Fri afternoon, min 28°C on Fri afternoon). Winds decreasing (extremely windy from the NW on Sat morning, gales from the SW by Mon morning). | |||||||||||||||||||
Tue 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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) | E 17 | E 17 | E 17 | E 17 | E 18 | E 18 | E 18 | E 18 | N 12 | N 13 | N 14 | NNW 12 | NW 12 | NNE 16 | WNW 12 | WNW 14 | ENE 15 | NW 15 | NW 14 | E 13 |
Wave Graph | ||||||||||||||||||||
1009 | 1526 | 1682 | 2149 | 4428 | 6539 | 7878 | 10265 | 13484 | 29461 | 40184 | 18815 | 14232 | 906 | 0 | 0 | 74 | 12099 | 12778 | 128 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:10PM2.00m | 10:43AM1.73m | 10:45PM1.94m | 11:55AM1.60m | 11:32PM1.88m | 1:45PM1.54m | 00:42AM1.83m | 3:47PM1.64m | 2:16AM1.84m | 5:01PM1.80m | 3:42AM1.94m | 5:50PM1.94m | ||||||||
Low Tide | 3:50PM0.69m | 4:40AM0.68m | 4:26PM0.88m | 5:37AM0.69m | 5:13PM1.09m | 6:52AM0.68m | 6:30PM1.28m | 8:24AM0.62m | 8:33PM1.36m | 9:48AM0.48m | 10:11PM1.29m | 10:54AM0.32m | 11:13PM1.17m | |||||||
— | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | |
7:14 | — | — | 7:13 | — | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — | — | 7:08 | — | |
mm | 2 | 3 | — | — | — | — | 1 | 7 | 16 | 51 | 198 | 109 | 141 | 245 | 110 | 89 | 58 | 5 | 4 | 3 |
Temp °C | 31 | 29 | 30 | 30 | 29 | 30 | 30 | 29 | 28 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 28 | 28 | 29 | 30 |
Feels °C | 34 | 33 | 31 | 31 | 31 | 27 | 27 | 24 | 20 | 16 | 13 | 11 | 11 | 13 | 13 | 13 | 16 | 20 | 24 | 27 |
Swell 1 Height (m) Direction Period (s) | E 17 | E 17 | E 17 | E 17 | E 18 | E 18 | E 18 | E 18 | E 17 | ENE 16 | ENE 13 | E 11 | NNE 16 | NNE 16 | S 11 | — | ENE 15 | NW 15 | NW 14 | ENE 13 |
1009 | 1526 | 1682 | 2149 | 4428 | 6539 | 7878 | 10265 | 9803 | 5860 | 3753 | 1351 | 1025 | 906 | 269 | — | 74 | 12099 | 12778 | 60 | |
Swell 2 Height (m) Direction Period (s) | S 8 | SE 8 | S 8 | S 7 | — | — | — | — | — | — | — | S 10 | S 14 | S 10 | SSE 14 | — | — | E 15 | E 15 | E 13 |
5 | 20 | 5 | 10 | — | — | — | — | — | — | — | 226 | 103 | 426 | 269 | — | — | 40 | 67 | 128 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | S 14 | S 10 | SSE 14 | — | — | — | — | — | NNE 14 |
— | — | — | — | — | — | — | — | — | — | — | 377 | 49 | 160 | — | — | — | — | — | 40 | |
Wind waves Height (m) Direction Period (s) | NNE 5 | — | NNE 6 | NNE 4 | NNE 6 | N 8 | N 8 | N 10 | N 12 | N 13 | N 14 | NNW 12 | NW 12 | WNW 12 | WNW 12 | WNW 14 | W 14 | WSW 13 | WSW 12 | WNW 14 |
7 | — | 21 | 26 | 150 | 736 | 1505 | 4833 | 13484 | 29461 | 40184 | 18815 | 14232 | 13446 | 31189 | 63588 | 58898 | 24707 | 10398 | 16491 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 12 | 10 | 23 | 621 | 621 | 1041 | 745 | 621 | 1333 | 647 | 745 | 773 | 745 | 745 | 773 | 635 | 635 | 635 | 631 | 631 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
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.











