Surf Forecasts:
Shida surf forecast from 12 Sep 2026:
- Best quality surf: Saturday 19 Sep, 3PM (local time) - 10ft (3.0m), 12s period, SE swell with onshore winds.
- Most powerful swell: Saturday 19 Sep, 9AM (local time) - 10ft (3.0m), 13s period, SE swell with 3,041 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 12PM (local time) - 2.5ft (0.7m), 13s 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 (Sep 13) at 12PM. The primary swell is predicted to be 0.7m and 13s period with a secondary swell of 0.6m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Shida in the next 16 days are 3.0m 13s and forecast to arrive on Saturday (Sep 19) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Tuesday (Sep 15) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Sun 13th Sep) | 2.5ft (0.7m) 13s |
| Best Surf | 3PM (Sat 19th Sep) | 10ft (3.0m) 12s |
| Most Powerful | 9AM (Sat 19th Sep) | 10ft (3.0m) 13s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
Hey, Rusty here. Let’s break down Shida for the next couple weeks. First thing, the water’s about 80°F, which is normal for this time.
Right from now, it’s a slow start. On Sunday, September 13th, we have tiny swell – 0.9 to 1 foot from the ESE – with moderate energy. The morning is junk with onshore wind, but the afternoon clears up with a light cross-off breeze. The waves are clean but super small.
Monday and Tuesday, the 14th and 15th, are a drag. Swell stays small (0.7-0.9 ft), but Monday has strong 15 mph cross-off wind, and both days have thunderstorms threatening. Not worth the effort.
Then it gets grim from Wednesday the 16th. The wind swings onshore and gets nasty – 12 to 25 mph from the NNE and NE. The swell builds to 3 ft on the 17th, then up to 3 ft on Friday the 18th, but it’s all onshore slop. By Saturday the 19th, we’re looking at 5 ft of messy, onshore swell – way too big and rough for this break.
The whole first week is a washout. Finally, on Monday the 21st, the afternoon shows a solid 3 ft south swell at 12 seconds, with a light 3 mph cross-off breeze. Clean waves and strong energy – this is a window for experienced surfers only because of the size.
The real highlight comes on Tuesday, September 22nd. The morning features 4 ft of SSW groundswell with a 12-second period and a clean offshore wind at 15 mph. Combined energy is huge at 3552. This is a proper, clean, powerful swell – but it’s expert-only territory. The afternoon drops to 3 ft with a fresher offshore breeze, still clean.
From Wednesday the 23rd, it’s back to onshore wind and messy waves, getting uglier towards the end of the month. By September 27th and 28th, we have massive groundswell (up to 6 ft with a 17-second period), but with onshore winds screaming at 28 to 31 mph, Shida will be a total mess – better for kiting than surfing.
So, bottom line: the first 8 days are poor. Your best – and really only – chances are the afternoon of Monday the 21st and the morning of Tuesday the 22nd. If you’ve got the experience, that’s the call.
Rusty.
Short Range ForecastModerate rain (total 18mm), heaviest on Tue morning. Warm (max 28°C on Mon morning, min 21°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 30mm), heaviest during Wed morning. Warm (max 23°C on Wed night, min 18°C on Fri morning). Winds increasing (light winds from the NNE on Wed morning, fresh winds from the NNE by Fri morning). | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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 13 | ESE 13 | E 12 | SSE 10 | SE 9 | SE 9 | E 14 | E 14 | SE 7 | E 13 | E 12 | E 12 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | SE 15 | SE 13 | SE 12 | SE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 242 | 178 | 108 | 107 | 147 | 231 | 195 | 196 | 171 | 215 | 148 | 138 | 207 | 345 | 469 | 566 | 590 | 1850 | 3041 | 2160 | 1528 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | on | cross-on |
High Tide | 5:12PM1.50m | 5:49AM1.42m | 5:32PM1.50m | 6:30AM1.34m | 5:51PM1.49m | 7:13AM1.25m | 6:12PM1.46m | 8:02AM1.15m | 6:32PM1.41m | 9:14AM1.06m | 6:55PM1.35m | 7:19PM1.28m | |||||||||
Low Tide | 11:09AM0.45m | 11:33PM0.31m | 11:35AM0.58m | 00:06AM0.27m | 11:59AM0.70m | 00:40AM0.28m | 12:20PM0.81m | 1:18AM0.32m | 12:36PM0.90m | 2:02AM0.39m | 12:42PM0.99m | 3:03AM0.46m | |||||||||
 |  |  | | |  |  |  |  | | |  |  | | |  | |  | | |  | |
 | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — |
 | — | 5:49 | — | — | 5:47 | — | — | 5:45 | — | — | 5:45 | — | — | 5:44 | — | — | 5:42 | — | — | 5:40 | — |
mm | — | — | — | — | — | 3 | 7 | 4 | 4 | 16 | 6 | — | — | — | 4 | 2 | 2 | — | — | 4 | 31 |
Temp °C | 23 | 24 | 26 | 28 | 27 | 26 | 25 | 26 | 25 | 22 | 22 | 23 | 22 | 22 | 20 | 19 | 19 | 21 | 23 | 23 | 22 |
Feels °C | 27 | 27 | 29 | 28 | 27 | 27 | 27 | 28 | 29 | 23 | 23 | 23 | 20 | 19 | 16 | 14 | 15 | 20 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | ESE 13 | ESE 9 | ESE 9 | SE 9 | SE 9 | SE 8 | SE 8 | SE 7 | E 13 | SE 8 | E 12 | E 12 | E 11 | E 12 | E 12 | SE 18 | SE 15 | SE 13 | SE 12 | SE 11 |
| kJ | 242 | 178 | 52 | 45 | 147 | 231 | 177 | 129 | 171 | 215 | 69 | 138 | 67 | 60 | 43 | 26 | 570 | 1850 | 3041 | 2160 | 1528 |
Swell 2 Height (m) Direction Period (s) | NE 6 | SE 9 | E 12 | E 12 | E 12 | E 14 | E 14 | E 14 | E 13 | SSE 7 | E 12 | SE 8 | SSE 10 | E 13 | SSE 9 | SE 20 | E 11 | ESE 9 | ENE 10 | ENE 10 | S 14 |
| kJ | 38 | 46 | 108 | 76 | 112 | 189 | 195 | 196 | 167 | 66 | 148 | 54 | 9 | 14 | 8 | 16 | 22 | 232 | 386 | 318 | 36 |
Swell 3 Height (m) Direction Period (s) | SSW 7 | ENE 6 | SSE 7 | NE 6 | ENE 7 | ENE 7 | ENE 7 | NE 10 | SW 5 | SE 9 | E 18 | E 16 | E 15 | SSE 9 | — | SE 8 | SSE 8 | — | — | — | — |
| kJ | 5 | 25 | 19 | 10 | 9 | 10 | 5 | 4 | 25 | 29 | 6 | 5 | 17 | 8 | — | 3 | 7 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 6 | — | — | SSE 10 | SSW 4 | S 7 | — | S 3 | — | NE 5 | NE 5 | ENE 6 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | ENE 9 |
| kJ | 53 | — | — | 107 | 11 | 1 | — | 5 | — | 26 | 56 | 103 | 207 | 345 | 469 | 566 | 590 | 375 | — | — | 232 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 0 | 0 | 155 | 592 | 115 | 7 | 0 | 17 | 35 | 30 | 70 | 216 | 216 | 303 | 303 | 544 | 303 | 561 | 87 | 63 |
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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