
Surf Forecasts:
Shida surf forecast from 11 Sep 2026:
- Best quality surf: Monday 14 Sep, 6PM (local time) - 3.5ft (1.1m), 9s period, SE swell with offshore winds.
- Most powerful swell: Friday 18 Sep, 3PM (local time) - 8ft (2.5m), 16s period, SE swell with 3,400 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 9PM (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 Sunday (Sep 13) at 9PM. The primary swell is predicted to be 0.6m and 12s period with a secondary swell of 0.6m and 8s. 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 16s and forecast to arrive on Friday (Sep 18) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 7s period and expected on Friday (Sep 18) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 13th Sep) | 2ft (0.6m) 12s |
| Best Surf | 6PM (Mon 14th Sep) | 3.5ft (1.1m) 9s |
| Most Powerful | 3PM (Fri 18th Sep) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what Shida’s got on offer. The sea is running at a warm 81° right now, about bang on normal for this time of year, so the water feels like home.
Right now and for the next few days, it’s pretty grim, to be honest. We’re looking at a real slow start. Through Friday the 11th and into Saturday the 12th, we’ve got tiny, weak 2ft to 2ft easterly slop with onshore or cross-onshore breezes, so it’s messy and basically unsurfable. Sunday the 13th doesn’t improve much, still small.
Monday the 14th is where we finally see a pulse of life. The morning is clean with a light south offshore, but it’s only 2ft and short period at 9 seconds, not much push. The afternoon though, that’s the first proper window. We get a clean 4ft southeasterly swell with a moderate offshore breeze from the SSW. The combined energy is moderate at 312, and it’s surfable. Not a standout, but a solid, clean session for intermediates.
The real standout, the one you circle on the calendar, is Sunday the 20th of September, afternoon session. We’ve got a nice 7ft southeasterly swell, period dropping to a punchy 9 seconds, and the wind is light and cross-offshore from the SSE, leaving the surface clean. The combined energy is still strong (1296). This is excellent surf for experienced surfers – that’s your best bet in the whole run. Shida can get crowded often, so expect company, but it’ll be worth it.
Monday the 21st sees a drop in size again, and the wind gets iffy. Through the middle of the week, we get some size but the wind is all over the place. Friday the 25th morning brings a big, long-period (16 seconds) 8ft swell from the SSE, clean with a cross-offshore breeze, and a massive energy reading (2789). This is expert-level territory – over 8ft, so only for the skilled.
Then Friday afternoon and Saturday the 26th, the swell just keeps pumping up to a very substantial 10ft to 12ft from the SE, with a very long period of 15-16 seconds. The energy readings are huge (4619, 5271). The problem is the wind is onshore or cross-shore, plus with that long period, this spot might get big and unruly. The data says it might actually be too big for this break. The afternoon of the 25th and all day the 26th are for experts only who know Shida very well, but honestly, the onshore wind is going to make it a battle.
Before that, Thursday the 24th is a write-off. Small, with a brutal 25 mph offshore wind that will be hard to paddle into.
So, to wrap it up: your absolute best window is Sunday the 20th afternoon – that's the clean, punchy, fun session. The big stuff later is for the brave and the very good, but the wind won't do it any favours. The start is a write-off. Get out there on the 20th.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Fri afternoon. Warm (max 24°C on Sun morning, min 19°C on Fri afternoon). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Tue afternoon. Warm (max 27°C on Mon morning, min 23°C on Wed afternoon). Wind will be generally light. | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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 14 | E 14 | E 14 | E 14 | E 13 | ESE 13 | ESE 13 | E 13 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | E 14 | E 13 | E 13 | E 12 | E 12 | E 12 | E 11 | SE 20 |
Wave Graph | |||||||||||||||||||||
106 | 101 | 136 | 134 | 128 | 184 | 176 | 168 | 108 | 81 | 188 | 199 | 192 | 196 | 167 | 165 | 148 | 138 | 132 | 116 | 194 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | cross-on | on | on | cross | glassy | off | off | off | off | off | cross-off | cross-off | on | cross-on | cross-on | on | on |
High Tide | 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 | 8:02AM1.15m | 6:32PM1.41m | ||||||||
Low Tide | 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 | 12:36PM0.90m | 2:02AM0.39m | |||||||
5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | |
— | 5:52 | — | — | 5:51 | — | — | 5:49 | — | — | 5:47 | — | — | 5:45 | — | — | 5:45 | — | — | 5:44 | — | |
mm | 2 | 6 | 9 | 6 | 2 | — | — | — | — | — | — | 1 | 2 | 4 | 3 | 1 | 1 | — | — | — | 2 |
Temp °C | 20 | 20 | 21 | 21 | 22 | 22 | 24 | 24 | 24 | 27 | 27 | 26 | 27 | 26 | 25 | 25 | 24 | 23 | 24 | 23 | 22 |
Feels °C | 21 | 20 | 22 | 22 | 23 | 23 | 27 | 26 | 29 | 28 | 28 | 29 | 29 | 27 | 28 | 29 | 28 | 25 | 26 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | E 14 | E 14 | E 13 | ESE 13 | ESE 13 | E 13 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | E 11 | E 11 |
41 | 40 | 136 | 134 | 128 | 184 | 176 | 168 | 93 | 81 | 188 | 199 | 189 | 171 | 155 | 135 | 90 | 90 | 69 | 116 | 116 | |
Swell 2 Height (m) Direction Period (s) | E 14 | E 14 | S 8 | SE 9 | SE 9 | NE 6 | NE 6 | SE 9 | E 12 | E 12 | E 12 | E 14 | E 14 | E 14 | E 13 | E 13 | E 12 | E 12 | E 12 | SE 7 | SE 8 |
106 | 101 | 28 | 40 | 39 | 22 | 23 | 61 | 108 | 76 | 112 | 189 | 192 | 196 | 167 | 165 | 148 | 138 | 132 | 34 | 42 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 9 | S 7 | SSW 7 | SE 8 | SE 9 | NE 6 | ENE 6 | E 9 | NE 7 | ENE 7 | S 7 | S 7 | S 9 | NE 5 | SE 8 | SE 8 | S 9 | SSE 9 | SE 20 |
23 | 23 | 22 | 28 | 18 | 28 | 21 | 19 | 16 | 42 | 11 | 11 | 1 | 1 | 2 | 3 | 3 | 3 | 2 | 8 | 194 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 5 | NE 5 | NE 5 | NE 6 | — | NE 6 | — | — | — | S 7 | SW 7 | — | — | NE 4 | NNE 5 | NE 6 | NE 4 | NE 6 | NE 4 | NE 6 |
31 | 17 | 22 | 23 | 21 | — | 43 | — | — | — | 1 | 2 | — | — | 8 | 8 | 11 | 18 | 15 | 15 | 98 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 30 | 17 | 17 | 17 | 23 | 17 | 3 | 56 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 17 | 23 | 216 | 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.










