Surf Forecasts:
Shida surf forecast from 23 Aug 2026:
- Best quality surf: Monday 24 Aug, 12PM (local time) - 5.5ft (1.7m), 17s period, SSE swell with offshore winds.
- Most powerful swell: Monday 24 Aug, 6PM (local time) - 6.5ft (2.0m), 15s period, SSE swell with 1,714 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 9PM (local time) - 2.5ft (0.7m), 12s period with SE 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 23) at 9PM. The primary swell is predicted to be 0.7m and 12s period with a secondary swell of 0.6m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Shida in the next 16 days are 2.0m 15s and forecast to arrive on Monday (Aug 24) 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 1.4m 5s period and expected on Thursday (Aug 27) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 23rd Aug) | 2.5ft (0.7m) 12s |
| Best Surf | 12PM (Mon 24th Aug) | 5.5ft (1.7m) 17s |
| Most Powerful | 6PM (Mon 24th Aug) | 6.5ft (2.0m) 15s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
Alright, let’s talk about Shida.
The next couple of days are pretty average. Sunday the 23rd is a write-off—tiny, messy, nothing to get excited about. Things start to lift on Monday the 24th. That morning, the wind swings offshore from the south, and we’ve got a clean 3ft SSE groundswell with a very long 18-second period. The energy is strong (941), and it’s looking clean and glassy. That Monday morning is a standout, no doubt. By the afternoon the swell jumps to 6ft from the same direction, still with offshore wind, but the period drops a touch to 16 seconds. That’s still excellent, but the size is getting solid—better for experienced surfers.
Tuesday the 25th stays big, around 6ft to 6ft SSE, but the wind turns cross-offshore, and while the surf is clean, the quality drops off a bit. Wednesday and Thursday are smaller again, around 3ft to 4ft, but the wind stays cross-offshore so it’s not completely blown out. Friday the 28th offers a tiny surprise—glassy conditions in the morning with a light 2ft E swell. The water temperature here is 81°, about average for the time of year.
After that, we hit a long poor stretch from Saturday the 29th right through to early September. Onshore winds and messy small surf make it pretty hopeless. Then around Tuesday the 1st of September, a new S swell pushes in at 4ft but with strong onshore winds, so it’s no good for a paddle. Wednesday the 2nd sees a bigger 6ft to 6ft ESE swell, but again cross-onshore winds keep it messy—that one might actually look better for kite surfing than paddling.
The second week is less certain, but there’s a promising window around Monday the 7th of September. Offshore winds from the south, 5ft E swell, moderate energy (638), and clean conditions. That morning looks very good. The afternoon holds similar but a little smaller. Before that, Sunday the 6th has strong offshore wind but the swell is a bit all over the place, and those big winds make paddling tough.
Overall, the standout is Monday morning the 24th of August at Shida – clean, glassy, good energy, and a long period SSE swell. If you can get out then, do it.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Mon afternoon, min 24°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Fri morning. Warm (max 29°C on Wed morning, min 23°C on Thu night). Winds decreasing (fresh winds from the SSW on Wed afternoon, calm by Fri night). | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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) | E 9 | SSE 12 | SSE 12 | SSE 18 | SSE 16 | SSE 13 | SSE 13 | SSE 13 | S 12 | S 12 | SSW 13 | SSW 12 | S 10 | E 13 | E 13 | E 12 | E 12 | S 10 | SSW 10 | S 10 | E 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 83 | 104 | 196 | 459 | 1634 | 960 | 1094 | 980 | 661 | 228 | 277 | 169 | 225 | 173 | 163 | 148 | 137 | 117 | 131 | 91 | 85 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | glassy | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | glassy | cross-on | cross-on | cross-on |
High Tide | 3:57PM1.20m | 11:30PM1.23m | 3:57PM1.26m | 1:06AM1.26m | 4:09PM1.31m | 2:09AM1.33m | 4:25PM1.36m | 2:57AM1.40m | 4:43PM1.40m | 3:40AM1.45m | 5:00PM1.43m | 4:21AM1.47m | 5:19PM1.46m | ||||||||
Low Tide | 7:26PM1.15m | 8:00AM0.35m | 8:31PM1.08m | 8:45AM0.27m | 9:07PM0.99m | 9:22AM0.21m | 9:38PM0.89m | 9:54AM0.18m | 10:08PM0.78m | 10:24AM0.19m | 10:38PM0.67m | 10:53AM0.24m | 11:10PM0.55m | ||||||||
 |  |  | | | | | | | | |  |  | |  |  | |  |  | | | |
 | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — |
 | — | 6:17 | — | — | 6:16 | — | — | 6:15 | — | — | 6:14 | — | — | 6:13 | — | — | 6:12 | — | — | 6:09 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 9 | 7 | — | — | — | — | 5 |
Temp °C | 27 | 27 | 25 | 28 | 29 | 26 | 29 | 29 | 27 | 29 | 29 | 27 | 28 | 28 | 27 | 25 | 27 | 25 | 26 | 26 | 25 |
Feels °C | 29 | 30 | 30 | 30 | 30 | 28 | 29 | 29 | 28 | 30 | 29 | 28 | 29 | 30 | 29 | 27 | 29 | 29 | 27 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | E 9 | E 9 | SSE 12 | SSE 12 | SSE 16 | SSE 13 | SSE 13 | SSE 13 | S 12 | SSE 10 | SSE 9 | SSE 10 | S 10 | S 8 | S 9 | S 8 | E 12 | S 10 | SSW 10 | S 10 | S 8 |
| kJ | 83 | 80 | 196 | 226 | 1634 | 960 | 1094 | 980 | 661 | 209 | 156 | 96 | 225 | 108 | 99 | 86 | 137 | 117 | 131 | 90 | 46 |
Swell 2 Height (m) Direction Period (s) | SSW 9 | SSE 12 | E 9 | SSE 18 | ESE 12 | SSE 16 | S 16 | ESE 13 | ESE 13 | S 12 | SSW 13 | SSW 12 | E 11 | E 13 | E 13 | E 12 | S 8 | E 12 | E 12 | E 11 | E 11 |
| kJ | 15 | 104 | 57 | 459 | 109 | 893 | 329 | 184 | 176 | 228 | 277 | 169 | 58 | 173 | 163 | 148 | 61 | 99 | 98 | 91 | 85 |
Swell 3 Height (m) Direction Period (s) | SSE 4 | ESE 12 | ESE 12 | SSE 15 | ESE 8 | ESE 11 | ESE 14 | — | E 19 | ESE 12 | ESE 12 | E 12 | E 14 | SW 11 | SSE 10 | SSE 9 | SE 10 | SE 10 | SE 11 | SSE 11 | SE 10 |
| kJ | 4 | 57 | 50 | 256 | 38 | 95 | 201 | — | 7 | 117 | 113 | 70 | 64 | 31 | 36 | 35 | 23 | 23 | 30 | 47 | 27 |
Wind waves Height (m) Direction Period (s) | NNE 2 | NE 3 | — | — | SSW 8 | SW 4 | SSW 4 | SSW 4 | SSW 4 | SW 4 | SSW 4 | SSW 5 | — | — | WSW 4 | — | SSW 4 | SW 3 | — | — | — |
| kJ | 1 | 1 | — | — | 46 | 17 | 16 | 21 | 14 | 8 | 35 | 106 | — | — | 14 | — | 7 | 6 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 17 | 115 | 0 | 0 | 0 | 91 | 91 | 592 | 91 | 91 | 592 | 104 | 104 | 91 | 0 | 0 | 0 | 0 | 63 | 63 | 17 |
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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