Surf Forecasts:
Shida surf forecast from 16 Aug 2026:
- Best quality surf: Friday 21 Aug, 6PM (local time) - 2.5ft (0.7m), 11s period, SSW swell with offshore winds.
- Most powerful swell: Sunday 16 Aug, 9PM (local time) - 4ft (1.2m), 9s period, E swell with 230 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 6PM (local time) - 3ft (0.9m), 8s 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 Monday (Aug 17) at 6PM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.4m and 11s. 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 1.2m 9s and forecast to arrive on Sunday (Aug 16) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Aug 22) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 17th Aug) | 3ft (0.9m) 8s |
| Best Surf | 6PM (Fri 21st Aug) | 2.5ft (0.7m) 11s |
| Most Powerful | 9PM (Sun 16th Aug) | 4ft (1.2m) 9s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the table for the next couple of weeks.
To be honest, the next week or so is pretty flat and ordinary. We've got a dry spell from Sunday the 16th right through the week, with only tiny, weak waves. The water temp is sitting at 79°, which is pretty normal for this time of year, so no surprises there. The energy is low, mostly under 300 (weak), and the swell is small and short-period. It's not until Saturday the 22nd afternoon that we start seeing something worth a mention, when a little 3ft easterly swell with a 10-second period rolls in and the wind swings offshore. That's the first real sign of life.
The real standout, and the one to circle on your calendar, is Wednesday the 26th of August morning at Shida. The guidance suggests this is a good spot when the swell comes from the southeast, and that's exactly what we get. The swell is 6ft from the SSE, with a long period of 15 seconds – that's a proper groundswell, full of energy. The combined energy is a solid 1851 (strong), and we've got a gentle offshore wind from the south. That's clean, lined-up surf for experienced surfers. The long period and SE direction should work well with the exposed setup here, but that size and power mean it's for the crew who know what they're doing.
After that, things get serious. From Thursday the 27th onward, the swell keeps building, but it quickly gets too big for Shida. By Friday the 28th afternoon, we're looking at 10ft from the SSE with a 16-second period and a combined energy of 5059 (very strong). The wind is cross-off, which is clean, but the swell is too big for this break. It's the same story through the weekend and into the following week with swells over 10ft and up to 25ft. The wind stays cross-off or cross-shore, but the power is just immense. This setup would be more interesting for kite surfing than paddle surfing – the waves are going to be thumping.
So, bottom line: Wednesday morning the 26th is your best bet. Get on it early, because after that, Shida is going to be a washing machine for the big dogs only.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun night. Warm (max 27°C on Tue morning, min 24°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Sat morning, min 24°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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 8 | E 9 | E 9 | E 9 | ESE 8 | ESE 8 | E 8 | SE 7 | E 9 | ESE 7 | ESE 7 | E 7 | E 8 | ESE 7 | ESE 7 | S 11 | SSW 11 | ESE 10 | E 10 | E 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 200 | 230 | 154 | 151 | 115 | 113 | 65 | 54 | 56 | 50 | 35 | 70 | 95 | 94 | 42 | 64 | 119 | 214 | 200 | 214 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-off | cross | cross-off | cross | cross | cross | cross-off | cross | cross-off | off | off | off | off | cross-off | off | off |
High Tide | 6:30PM1.47m | 6:42AM1.33m | 6:50PM1.46m | 7:30AM1.22m | 7:11PM1.44m | 8:25AM1.11m | 7:33PM1.41m | 9:44AM1.02m | 7:57PM1.37m | 8:28PM1.31m | 9:26PM1.25m | |||||||||
Low Tide | 00:42AM0.48m | 12:36PM0.53m | 1:22AM0.44m | 12:59PM0.68m | 2:06AM0.43m | 1:18PM0.81m | 2:56AM0.45m | 1:27PM0.93m | 4:02AM0.48m | 5:32AM0.48m | ||||||||||
 |  |  | | | | |  | |  | | | |  | | | | | | | |
 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — |
 | 6:27 | — | — | 6:25 | — | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — |
mm | — | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 26 | 25 | 27 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 28 | 28 | 26 |
Feels °C | 27 | 27 | 28 | 28 | 28 | 29 | 30 | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 30 | 28 | 28 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 9 | E 9 | E 9 | ESE 8 | ESE 8 | E 8 | SE 7 | SE 7 | ESE 7 | ESE 7 | E 7 | E 8 | ESE 7 | ESE 7 | E 8 | E 9 | ESE 10 | E 10 | E 10 |
| kJ | 200 | 230 | 154 | 151 | 115 | 113 | 65 | 54 | 47 | 50 | 35 | 70 | 95 | 94 | 42 | 47 | 113 | 214 | 200 | 214 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 8 | SSW 8 | SE 11 | SE 10 | SE 10 | SE 7 | E 8 | E 9 | E 9 | E 8 | SE 11 | SE 11 | S 9 | S 8 | S 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 |
| kJ | 36 | 35 | 24 | 30 | 39 | 36 | 37 | 51 | 56 | 39 | 23 | 40 | 41 | 39 | 35 | 64 | 119 | 80 | 56 | 55 |
Swell 3 Height (m) Direction Period (s) | ESE 9 | SE 11 | SE 11 | SSW 8 | SSW 8 | SSW 8 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | S 11 | S 10 | SE 11 | E 8 | S 9 | SE 10 | SE 10 | E 13 | S 4 |
| kJ | 35 | 31 | 30 | 23 | 13 | 6 | 26 | 36 | 25 | 35 | 35 | 21 | 30 | 41 | 35 | 39 | 36 | 16 | 55 | 5 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SSE 6 | — | — | SE 6 | S 4 | S 4 | S 4 | SSW 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | 34 | 6 | 17 | 18 | 13 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 77 | 8 | 115 | 63 | 0 | 17 | 0 | 70 | 70 | 63 | 0 | 208 | 0 | 0 | 0 | 0 | 0 | 91 | 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.
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