
Surf Forecasts:
Shida surf forecast from 8 Aug 2026:
- Best quality surf: Sunday 9 Aug, 12AM (local time) - 5.5ft (1.7m), 14s period, ESE swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 6PM (local time) - 8ft (2.5m), 12s period, E swell with 1,721 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 12AM (local time) - 5.5ft (1.7m), 14s period with ESE 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 Sunday (Aug 09) at 12AM. The primary swell is predicted to be 1.7m and 14s period with a secondary swell of 1.0m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Shida in the next 16 days are 2.5m 12s and forecast to arrive on Saturday (Aug 15) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 8s period and expected on Tuesday (Aug 11) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 9th Aug) | 5.5ft (1.7m) 14s |
| Best Surf | 12AM (Sun 9th Aug) | 5.5ft (1.7m) 14s |
| Most Powerful | 6PM (Sat 15th Aug) | 8ft (2.5m) 12s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at the charts for the next couple of weeks. It’s a strange one, so let’s break it down.
The first real action we see is a bit of a slow start. The weekend of the 9th and 10th has some swell, but the wind is messy and the conditions are just average. Nothing to get too excited about just yet. The real standout here is actually the middle of the week, specifically Tuesday, the 11th of August. That’s the one to circle.
Shida is the only spot on the menu, and it’s an inconsistent little wave, so when it comes alive, you have to pay attention. On Tuesday morning, the 11th, we’ve got a solid 7 ft east swell, a 12-second period—that’s proper groundswell, with plenty of energy in the water (1254). The wind is a light cross-offshore breeze, which is going to keep the surface clean. It’s a good size for experienced surfers, with a bit of power. The afternoon gets even better: the wind swings offshore, clean and steady, with the swell dropping just a touch to 6 ft but still holding that 11-second period. The water is sitting around 78°, which is just about normal for this time of year. That Tuesday is the best on offer, no doubt.
From Wednesday the 12th, things start to fade quickly. The swell drops right off, and the wind gets messy with onshore components. There’s a big gap of poor conditions from the 13th through the 15th, with strong onshore winds and rain. It’s not worth paddling out.
Then, from Sunday the 16th of August, the swell really cranks up—10 ft, then 12 ft, then 16 ft on the 18th. That’s a massive amount of energy (2654, 2732, even 8549). But here’s the thing: the forecast keeps saying “too big for this break.” At Shida, that kind of size is just too much; it’s going to be unruly and dangerous. For a spot that’s inconsistent, this is a solid pass unless you’re a very experienced charger looking for a heavy session, and even then, the risk is high.
After that, the swell backs off again. The 19th of August has a nice clean 6 ft morning with offshore winds, but the period is short and the energy is moderate. The end of the run, around the 22nd and 23rd, sees small, long-period groundswells (15-16 seconds), but the size is tiny—1 ft to 3 ft. It’s clean but not worth the drive.
So, to wrap it up: the absolute standout is Tuesday, the 11th of August. That’s your window. After that, it’s a long wait for anything that’s both clean and a good size, and the really big stuff is just too much for this break. Keep your eyes on the forecasts; things can change.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Sat afternoon, min 22°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 38mm), heaviest during Tue night. Warm (max 27°C on Thu morning, min 23°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sat 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 14 | ESE 13 | ESE 13 | ESE 12 | E 12 | E 12 | ENE 10 | E 12 | E 11 | ENE 11 | E 10 | E 9 | E 9 | E 10 | E 9 | E 9 | E 10 | E 9 | E 9 |
Wave Graph | ||||||||||||||||||||
624 | 1053 | 998 | 903 | 794 | 1136 | 1074 | 1198 | 1084 | 778 | 297 | 181 | 162 | 153 | 257 | 241 | 365 | 668 | 588 | 670 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross | cross | on | cross-on | cross-on | cross-on | cross-off | off | off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on |
High Tide | 10:24PM1.37m | 3:49PM1.28m | 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 | ||||||||
Low Tide | 7:14AM0.22m | 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 | ||||||||
— | — | 4:52 | — | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | |
6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 9 | 6 | 3 | 2 | 1 | 2 | 12 | 3 | 14 | 11 |
Temp °C | 27 | 25 | 27 | 27 | 25 | 27 | 26 | 23 | 25 | 25 | 25 | 26 | 26 | 25 | 27 | 27 | 26 | 26 | 24 | 24 |
Feels °C | 28 | 28 | 29 | 28 | 28 | 25 | 24 | 23 | 25 | 24 | 25 | 29 | 28 | 28 | 28 | 28 | 28 | 27 | 25 | 23 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | ESE 14 | ESE 13 | ESE 13 | ESE 12 | E 12 | E 12 | E 11 | E 12 | E 11 | ENE 11 | E 10 | E 9 | E 9 | E 10 | E 9 | S 10 | E 9 | S 11 | E 9 |
624 | 1053 | 998 | 903 | 794 | 1136 | 1074 | 815 | 1084 | 778 | 297 | 181 | 162 | 153 | 257 | 241 | 49 | 417 | 112 | 670 | |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | S 10 | S 10 | S 10 | S 11 | S 11 | S 10 | S 10 | NE 9 | E 10 | S 10 | SE 5 | SSW 10 | S 10 | S 10 | S 13 | SSW 9 | SE 15 | SSE 11 |
282 | 231 | 133 | 141 | 104 | 93 | 119 | 78 | 80 | 307 | 221 | 78 | 26 | 85 | 74 | 51 | 13 | 28 | 9 | 186 | |
Swell 3 Height (m) Direction Period (s) | E 10 | SW 14 | — | SW 12 | SW 12 | SW 12 | SW 11 | SE 14 | SSW 11 | SW 11 | S 10 | SE 13 | S 10 | E 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | S 21 | SE 20 |
46 | 29 | — | 90 | 38 | 37 | 103 | 7 | 90 | 42 | 74 | 7 | 80 | 61 | 13 | 13 | 13 | 40 | 9 | 15 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | ENE 10 | — | SSW 11 | S 4 | ESE 5 | — | NE 7 | NE 4 | — | E 9 | E 10 | E 9 | — |
— | — | — | — | — | — | — | 1198 | — | 130 | 7 | 67 | — | 34 | 16 | — | 365 | 668 | 588 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 565 | 0 | 17 | 63 | 3 | 63 | 63 | 17 | 0 | 0 | 0 | 85 | 0 | 17 | 70 | 63 | 63 | 17 | 216 | 216 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||
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 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.











