
Surf Forecasts:
Shida surf forecast from 12 Aug 2026:
- Best quality surf: Saturday 15 Aug, 12AM (local time) - 5ft (1.5m), 10s period, E swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 3PM (local time) - 8ft (2.5m), 10s period, E swell with 1,506 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 12AM (local time) - 5ft (1.5m), 10s 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 Saturday (Aug 15) at 12AM. The primary swell is predicted to be 1.5m and 10s period with a secondary swell of 0.6m and 10s. 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 2.5m 10s and forecast to arrive on Sunday (Aug 16) 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 1.1m 6s period and expected on Wednesday (Aug 12) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sat 15th Aug) | 5ft (1.5m) 10s |
| Best Surf | 12AM (Sat 15th Aug) | 5ft (1.5m) 10s |
| Most Powerful | 3PM (Sun 16th Aug) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
Alright, let’s break down what we’ve got here. Only one spot to talk about – Shida – and it’s a finicky one, rarely breaking clean. The whole 16-day run looks pretty thin, so don’t get your hopes too high.
The action, if you can call it that, starts around Wednesday, August 12th. There’s a 7ft ESE swell showing, but it comes with risk of thunderstorms and a cross-offshore breeze. The combined energy is moderate at about 762, but conditions are marginal at best. Water temp is 81°F, just a touch warmer than average for the time of year, so nothing wild there. The big issue: Shida is inconsistent, so a lot needs to line up for it to work.
Through Thursday and Friday we get chest-high waves around 5ft from the east, but the winds stay cross or cross-on, leaving the surface messy. The energy stays in the moderate range (around 480-501), but for us paddle surfers it’s all a bit ordinary.
Come the weekend of August 16th-17th, the swell cranks up. Sunday morning sees 8ft from the ESE with strong energy at 1069, and by the afternoon it’s 8ft and a huge 2696 in energy. But here’s the catch – the wind is a solid NE cross-on at 12-16 mph. With that size and onshore chop, this beach-and-reef setup looks way more suited for kites than paddleboards. Expert-only if you’re even thinking about it.
The second week drops right off. From August 18th onward, we’re looking at waves mostly under 3ft, with energy falling into the 100s. A couple of bright spots show up: Thursday morning August 20th goes glassy with a light WSW breeze and only 2ft from the south – tiny, but clean. The 12-second period swell on August 26th (2ft) from the ESE is a long-period groundswell, but it’s got no size behind it.
The one true standout is the very end of the forecast. On Thursday, August 27th, the morning goes glassy with a slight air and a fun 6ft peak from the ENE at a short 7-second period. Energy is moderate at 391, and the wind goes offshore in the afternoon. That’s a solid-looking session, but it’s over a week away and Shida is never a sure thing, so treat it as promising, not a lock.
Expect long gaps with no real recommendations, especially through the second week. For an inconsistent spot like this, a blank spell is normal. Stay patient, keep an eye on that last Thursday, and don’t force it.
Rusty.
Short Range ForecastHeavy rain (total 37mm), heaviest during Wed morning. Warm (max 27°C on Thu morning, min 23°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sat morning. Warm (max 27°C on Sat morning, min 23°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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) | ESE 9 | E 9 | E 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | ESE 10 | E 10 | E 11 | E 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | SSE 10 |
Wave Graph | |||||||||||||||||||||
669 | 201 | 318 | 383 | 426 | 434 | 443 | 434 | 414 | 484 | 495 | 734 | 1018 | 1506 | 1379 | 919 | 739 | 322 | 185 | 119 | 178 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | on | cross-on | cross | cross-on | cross-on | cross | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | off | cross-off |
High Tide | 5:03PM1.43m | 3:31AM1.51m | 5:26PM1.45m | 4:22AM1.52m | 5:48PM1.46m | 5:10AM1.49m | 6:09PM1.47m | 5:56AM1.42m | 6:30PM1.47m | 6:42AM1.33m | 6:50PM1.46m | 7:30AM1.22m | 7:11PM1.44m | ||||||||
Low Tide | 9:55AM0.01m | 10:09PM0.91m | 10:34AM0.04m | 10:48PM0.78m | 11:09AM0.11m | 11:26PM0.65m | 11:41AM0.23m | 00:04AM0.55m | 12:10PM0.38m | 00:42AM0.48m | 12:36PM0.53m | 1:22AM0.44m | 12:59PM0.68m | 2:06AM0.43m | |||||||
4:54 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — | |
— | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — | — | 6:25 | — | — | 6:23 | — | |
mm | 8 | 6 | — | 2 | — | 3 | 1 | — | 17 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 24 | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 27 | 25 | 26 | 26 | 24 | 25 | 25 | 24 | 25 | 26 | 25 |
Feels °C | 26 | 27 | 27 | 29 | 29 | 28 | 29 | 29 | 29 | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 27 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | S 6 | E 9 | E 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | ESE 10 | E 10 | E 11 | E 10 | SSW 9 | ENE 9 | ENE 8 | ENE 8 | SSE 10 |
34 | 201 | 318 | 383 | 426 | 434 | 443 | 434 | 414 | 484 | 495 | 476 | 1018 | 1160 | 1379 | 919 | 29 | 322 | 185 | 119 | 178 | |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | S 10 | S 10 | SSW 9 | SSW 9 | S 9 | S 10 | S 11 | S 10 | S 9 | S 9 | S 10 | S 9 | SSW 10 | SE 11 | SSW 8 | SSW 9 | SSE 10 | E 9 |
53 | 53 | 51 | 71 | 48 | 29 | 28 | 40 | 67 | 63 | 53 | 41 | 27 | 30 | 25 | 31 | 19 | 24 | 25 | 68 | 38 | |
Swell 3 Height (m) Direction Period (s) | SE 13 | S 6 | S 5 | — | SE 12 | SSE 11 | SE 11 | SSE 11 | S 13 | SSE 10 | SSE 8 | SE 12 | SSW 11 | — | — | SE 16 | SE 16 | SE 10 | SE 10 | S 15 | NE 8 |
6 | 16 | 8 | — | 6 | 12 | 30 | 23 | 50 | 31 | 6 | 6 | 24 | — | — | 10 | 10 | 28 | 27 | 4 | 20 | |
Wind waves Height (m) Direction Period (s) | ESE 9 | E 5 | — | — | — | — | — | — | — | — | — | E 9 | — | E 10 | — | — | ENE 9 | — | — | SW 4 | SW 4 |
669 | 53 | — | — | — | — | — | — | — | — | — | 734 | — | 1506 | — | — | 739 | — | — | 15 | 18 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 94 | 74 | 3 | 17 | 17 | 17 | 63 | 63 | 0 | 74 | 74 | 23 | 63 | 63 | 3 | 63 | 17 | 3 | 7 | 0 | 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.











