
Surf Forecasts:
Shida surf forecast from 10 Sep 2026:
- Best quality surf: Monday 14 Sep, 12AM (local time) - 2ft (0.6m), 12s period, E swell with glassy winds.
- Most powerful swell: Friday 18 Sep, 3AM (local time) - 3ft (0.9m), 20s period, SE swell with 552 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 12AM (local time) - 2ft (0.6m), 12s 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 Monday (Sep 14) at 12AM. The primary swell is predicted to be 0.6m 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 0.9m 20s and forecast to arrive on Friday (Sep 18) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 14th Sep) | 2ft (0.6m) 12s |
| Best Surf | 12AM (Mon 14th Sep) | 2ft (0.6m) 12s |
| Most Powerful | 3AM (Fri 18th Sep) | 3ft (0.9m) 20s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what Shida has in store for us over the next couple of weeks. First thing you gotta know: Shida is an inconsistent break, and this outlook shows it. Don't get your hopes up for the first week; we’re looking at a pretty frustrating stretch.
Right now, the water temperature at Shida is about average for this time of year, so no need to worry about a weird chill or a warm patch.
The first few days, from Friday the 11th right through to the end of the weekend on the 13th, are pretty much a write-off. We’ve got easterly swells coming in at a weak 2 ft to 2 ft, with short, weak periods around 13-14 seconds. The winds are all onshore or cross-onshore from the north-northeast, making things choppy and messy. The combined swell energy is weak to moderate (206 to 286), and honestly, it’s just not worth paddling out. There’s a slight glimmer on Sunday afternoon with a light cross-shore breeze, but the surf is still marginal.
Finally, we get a turn. From Monday the 14th through Tuesday the 15th, things clean up nicely. The wind swings offshore from the south and southwest, creating some clean, rideable waves. The swell eases out of the southeast, building slowly from 3 ft to 4 ft. The period is a bit short (8-9 seconds), so it’ll be a little weaker and steeper on the face, but the energy is building from moderate to the upper end of moderate (247 to 439). This is the best window in the first week. Monday morning with the light offshore breeze and a clean 3 ft from the SE is your pick of the early period. Just be aware that crowds are often a thing here, so get out early.
After that, from Wednesday the 16th to Friday the 18th morning, it falls apart again. Onshore winds return, and the swell drops to a messy 2 ft to 2 ft. But the real story is Friday the 18th. The swell jumps up to 6 ft in the morning and 8 ft by the afternoon, with a very long period of 16 seconds. The combined energy shoots up into the thousands (1,872 to 3,652), indicating massive wave energy. The problem? The wind is onshore and strong from the north-northeast. The size is there, but it’s a complete mess. Not great for a paddle board.
Now, we look into the second week, and this is where it gets promising but unpredictable. Saturday the 19th and Sunday the 20th look like the standout days on paper, but you have to be an expert. The swell from the southeast is pumping 12 ft, with a long period (14-15 seconds) and combined energy over 4,800. The wind is forecast to be cross-offshore from the south-southeast on Sunday, which would be perfect and clean. But – and this is a big but – this break is predicted to be way too big for it. We’re talking an 12 ft SE swell that will be breaking straight and heavy. That is strictly for experts only, and probably one for the big boat.
The 22nd of September takes it even further, with a massive 20 ft south swell (combined energy over 11,000) – totally unrideable for Shida. Then Wednesday the 23rd sees the swell drop like a stone to 4 ft-4 ft but with howling 25-28 mph offshore winds. It’ll be clean but impossible to paddle into, so maybe something to watch if the wind eases.
The very tail end, Thursday the 24th, offers the only real small-wave moment. A tiny 2 ft easterly swell with glassy conditions in the afternoon (energy down to just 56) and light winds. You could get a few knee-high rollers on a longboard. The outlook for Friday the 25th and Saturday the 26th is poor again with messy onshore winds.
So, to wrap it up: Don't bother with the first week until Monday and Tuesday. The real energy comes in the second week (Sept 19-22), but it’s far too big for this spot. If you're an expert seeking a massive swell, maybe keep an eye on Sunday the 20th, but don't bank on it.
Stay patient, folks. Rusty out.
Short Range ForecastLight rain (total 9mm), mostly falling on Fri morning. Warm (max 25°C on Sun afternoon, min 19°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Tue morning. Warm (max 28°C on Mon morning, min 23°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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) | ENE 7 | E 14 | E 14 | E 14 | E 14 | E 13 | ESE 13 | ESE 13 | ESE 13 | E 12 | SE 9 | SE 9 | SE 9 | E 14 | SE 8 | SE 8 | E 13 | E 12 | E 12 |
Wave Graph | |||||||||||||||||||
128 | 106 | 101 | 136 | 134 | 128 | 184 | 176 | 178 | 108 | 155 | 203 | 220 | 201 | 206 | 169 | 165 | 145 | 138 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | cross-on | on | on | cross | glassy | off | off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on |
High Tide | 3:38AM1.47m | 4:34PM1.46m | 4:24AM1.49m | 4:53PM1.48m | 5:07AM1.47m | 5:12PM1.50m | 5:49AM1.42m | 5:32PM1.50m | 6:30AM1.34m | 5:51PM1.49m | 7:13AM1.25m | 6:12PM1.46m | |||||||
Low Tide | 9:53PM0.67m | 10:09AM0.25m | 10:27PM0.52m | 10:40AM0.34m | 11:00PM0.40m | 11:09AM0.45m | 11:33PM0.31m | 11:35AM0.58m | 00:06AM0.27m | 11:59AM0.70m | 00:40AM0.28m | 12:20PM0.81m | 1:18AM0.32m | ||||||
— | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | |
— | — | 5:52 | — | — | 5:51 | — | — | 5:49 | — | — | 5:47 | — | — | 5:45 | — | — | 5:45 | — | |
mm | — | 2 | 2 | 4 | 1 | — | — | — | — | — | — | — | — | 2 | 1 | 3 | 1 | 1 | — |
Temp °C | 20 | 20 | 20 | 20 | 22 | 23 | 23 | 24 | 25 | 25 | 28 | 27 | 26 | 25 | 24 | 24 | 24 | 23 | 24 |
Feels °C | 19 | 20 | 20 | 21 | 24 | 25 | 26 | 27 | 28 | 30 | 30 | 29 | 28 | 27 | 27 | 28 | 27 | 24 | 28 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | E 14 | E 14 | E 13 | ESE 13 | ESE 13 | ESE 13 | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 |
63 | 41 | 40 | 136 | 134 | 128 | 184 | 176 | 178 | 61 | 155 | 203 | 220 | 201 | 206 | 169 | 113 | 82 | 78 | |
Swell 2 Height (m) Direction Period (s) | ESE 14 | E 14 | E 14 | S 8 | SE 9 | SE 9 | NE 6 | NE 6 | SE 8 | E 12 | E 12 | E 12 | E 14 | E 14 | E 14 | E 13 | E 13 | E 12 | E 12 |
67 | 106 | 101 | 28 | 40 | 39 | 18 | 30 | 50 | 108 | 76 | 110 | 189 | 188 | 196 | 167 | 165 | 145 | 138 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 9 | SSW 7 | SSW 7 | SE 8 | SE 8 | NE 6 | ESE 9 | ENE 6 | NE 6 | NE 7 | ENE 10 | ENE 10 | ENE 9 | SSE 9 | SE 8 | SE 8 |
15 | 23 | 23 | 22 | 18 | 18 | 20 | 35 | 19 | 45 | 16 | 10 | 2 | 9 | 37 | 32 | 8 | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 6 | ENE 5 | NE 5 | NE 6 | NE 6 | — | NE 6 | — | — | — | S 7 | SW 7 | — | — | — | NE 3 | NE 4 | NE 5 |
128 | 36 | 17 | 22 | 26 | 18 | — | 45 | — | — | — | 1 | 2 | — | — | — | 4 | 9 | 9 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 35 | 56 | 17 | 3 | 17 | 17 | 17 | 3 | 56 | 0 | 0 | 0 | 155 | 0 | 0 | 0 | 17 | 70 | 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.










