Surf Forecasts:
Shida surf forecast from 9 Aug 2026:
- Best quality surf: Saturday 15 Aug, 6PM (local time) - 10ft (3.0m), 11s period, E swell with cross-onshore winds.
- Most powerful swell: Saturday 15 Aug, 3PM (local time) - 10ft (3.0m), 12s period, E swell with 2,344 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 6PM (local time) - 5ft (1.6m), 12s period with E swell.
Best Forecast Surf Conditions for Shida this week:
The surf forecast for Shida over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 11) at 6PM. The primary swell is predicted to be 1.6m and 12s period with a secondary swell of 0.9m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Shida in the next 16 days are 3.0m 12s and forecast to arrive on Saturday (Aug 15) at 3PM. 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 8s period and expected on Tuesday (Aug 11) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 11th Aug) | 5ft (1.6m) 12s |
| Best Surf | 6PM (Sat 15th Aug) | 10ft (3.0m) 11s |
| Most Powerful | 3PM (Sat 15th Aug) | 10ft (3.0m) 12s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
Hey crew, Rusty here. Let’s talk about the next couple of weeks at Shida.
It’s a slow start, I'm not gonna lie. The first week suffers from a lot of messy wind and onshore chop, even though there’s some decent swell energy out there. The quality just isn't there. The real gold is going to be in the second half of the outlook, near the end of August.
Water temp is a warm 80°, feeling pretty normal for the season.
Alright, let’s pick out the good stuff. The first real window of clean surf comes on Wednesday morning, August 12th. You’ll have a gentle cross-offshore breeze cleaning up a 4ft E swell with a 10-second period. The energy is moderate (517) and while it’s not huge, it’s your first chance to get some clean, rideable waves in the early part of the forecast.
Then things go quiet and choppy until Sunday morning, August 16th. That’s the next bright spot. Light ESE cross-offshore winds, a clean 5ft E swell (505 energy), and the report says "expect very good surf conditions." It’s smaller, but the quality will make up for it.
But the standout is unquestionably Tuesday, August 18th. This is the one to wait for. In the morning you’ve got clean conditions with a 6ft ESE swell, and by the afternoon it’s a solid 7ft E swell with clean, moderate offshore SSW winds. The energy is strong at 744, and the report says "expect very good surf conditions." This will be the best, cleanest, and most powerful session of the whole outlook for the intermediate crew.
After that, there’s some more promising but less certain surf around Saturday, August 22nd with a long-period S swell, and some SSE swell on Monday, August 24th around 6ft with offshore breezes. Those late-August days are the ones to watch, but it’s a bit too far out to lock in.
So, the program is simple: the first week is mostly a bust. The second week from Aug 16-19 has the cleanest, most rewarding surf, and Tuesday the 18th is the clear winner. Crowds will be a factor when it’s good, so be ready for it.
Keep the wax warm, it’ll come good.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Wed morning. Warm (max 28°C on Tue morning, min 22°C on Mon night). Winds decreasing (fresh winds from the NE on Mon afternoon, light winds from the W by Tue morning). | Days 5-7 Weather SummaryHeavy rain (total 39mm), heaviest during Thu night. Warm (max 28°C on Thu morning, min 24°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 13 | ESE 12 | E 12 | E 11 | ENE 10 | ENE 10 | E 11 | ENE 11 | E 10 | E 9 | E 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 10 | E 11 | E 12 | E 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 903 | 794 | 1227 | 1095 | 860 | 739 | 663 | 427 | 312 | 162 | 196 | 318 | 400 | 580 | 682 | 533 | 567 | 1201 | 2344 | 890 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | on | on | on | off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | cross-on | cross-on | cross-off |
High Tide | 11:59PM1.37m | 4:13PM1.35m | 1:26AM1.41m | 4:39PM1.40m | 2:34AM1.47m | 5:03PM1.43m | 3:31AM1.51m | 5:26PM1.45m | 4:22AM1.52m | 5:48PM1.46m | 5:10AM1.49m | 6:09PM1.47m | ||||||||
Low Tide | 7:20PM1.20m | 8:18AM0.12m | 8:39PM1.13m | 9:10AM0.04m | 9:28PM1.03m | 9:55AM0.01m | 10:09PM0.91m | 10:34AM0.04m | 10:48PM0.78m | 11:09AM0.11m | 11:26PM0.65m | 11:41AM0.23m | 00:04AM0.55m | |||||||
 |  |  | | | |  |  |  | | | | |  | | | | | | | |
 | — | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — |
 | 6:35 | — | — | 6:34 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — |
mm | — | — | — | — | — | — | 1 | 7 | 5 | 2 | 5 | — | 1 | 16 | 3 | 6 | 2 | 4 | 1 | 1 |
Temp °C | 27 | 25 | 27 | 26 | 24 | 28 | 26 | 25 | 26 | 27 | 25 | 28 | 28 | 26 | 25 | 26 | 25 | 26 | 27 | 26 |
Feels °C | 28 | 27 | 26 | 25 | 23 | 28 | 24 | 25 | 26 | 28 | 27 | 29 | 28 | 28 | 26 | 28 | 27 | 26 | 28 | 31 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | ESE 12 | E 12 | SSW 11 | S 10 | ENE 10 | E 11 | ENE 11 | E 10 | E 9 | E 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 10 | E 11 | E 12 | E 10 |
| kJ | 903 | 794 | 1227 | 97 | 78 | 739 | 663 | 427 | 312 | 162 | 196 | 318 | 400 | 580 | 682 | 533 | 567 | 1201 | 2344 | 890 |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | S 11 | SW 11 | SE 14 | S 10 | NE 9 | ESE 11 | S 10 | S 10 | S 10 | S 10 | S 10 | SSW 10 | S 12 | SSE 11 | SSE 10 | S 11 | SSW 11 | S 10 |
| kJ | 141 | 102 | 93 | 103 | 8 | 55 | 164 | 314 | 75 | 75 | 51 | 51 | 50 | 31 | 67 | 135 | 163 | 10 | 40 | 45 |
Swell 3 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SSE 11 | SE 13 | SW 11 | S 11 | S 10 | SSW 10 | SSE 12 | — | — | SE 11 | SSE 14 | SSW 9 | SSW 9 | SSW 9 | SE 19 | SE 18 | SE 12 |
| kJ | 90 | 23 | 23 | 11 | 27 | 43 | 58 | 74 | 130 | 14 | — | — | 5 | 40 | 16 | 16 | 8 | 15 | 13 | 35 |
Wind waves Height (m) Direction Period (s) | — | — | NNE 5 | E 11 | ENE 10 | NE 9 | — | S 3 | E 3 | ENE 4 | ENE 4 | — | — | — | — | — | — | — | NNE 6 | — |
| kJ | — | — | 50 | 1095 | 860 | 514 | — | 5 | 6 | 17 | 12 | — | — | — | — | — | — | — | 303 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 63 | 23 | 70 | 63 | 63 | 3 | 19 | 0 | 63 | 17 | 3 | 63 | 63 | 63 | 17 | 84 | 17 | 87 | 115 | 0 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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Information about the Shida Surf forecast
The above surf forecast table for Shida provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Shida can be found by selecting the local surf guide option on the grey menu. Our Shida 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 (Shida) 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 Shida 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.
Shida is 9 km (6 miles) from the city of Ohara. If you plan a holiday in Chiba, look for hotels and other accommodation in Ohara. Ohara has rooms for a wide range of budgets as well as car hire and transport links.
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