
Surf Forecasts:
Shida surf forecast from 6 Aug 2026:
- Best quality surf: Friday 7 Aug, 3AM (local time) - 6.5ft (2.0m), 13s period, S swell with cross-offshore winds.
- Most powerful swell: Tuesday 11 Aug, 3AM (local time) - 10ft (3.0m), 12s period, ENE swell with 2,155 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 3AM (local time) - 6.5ft (2.0m), 13s period with S 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 Friday (Aug 07) at 3AM. The primary swell is predicted to be 2.0m and 13s period with a secondary swell of 1.4m and 10s. 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 3.0m 12s and forecast to arrive on Tuesday (Aug 11) at 3AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 7th Aug) | 6.5ft (2.0m) 13s |
| Best Surf | 3AM (Fri 7th Aug) | 6.5ft (2.0m) 13s |
| Most Powerful | 3AM (Tue 11th Aug) | 10ft (3.0m) 12s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here. Let’s have a look at what’s in store for the next couple of weeks.
We’ve got a bit of a quiet start, but the first real opportunity comes in on Friday, the 7th of August. Shida is the only spot on the menu, and it’s an inconsistent little number, so when it fires, it’s a bit of an event. Friday morning kicks off with a solid 6ft south swell, with a nice 12-second period pushing some serious energy through (1314). The wind is offshore, light but clean, and the water temp is about average for this time of year. This is proper surf for experienced surfers, and the size is getting up there, so it’s not one for the beginners. The long-period groundswell will be best handled by the more experienced. Friday afternoon keeps the quality up with a 5ft south swell, still offshore, and still clean.
Saturday, the 8th, backs off a touch. Swell drops to 4ft from the southeast, with a cross-offshore breeze. It’s clean and the energy is moderate (621), so a good option for a wider range of skill levels, but nothing massive. Sunday the 9th sees a shift; the swell picks up again to 6ft from the east-southeast, but the wind turns cross-onshore. The quality drops, and it just gets a bit messy. Monday and Tuesday are a write-off with strong onshore winds and lumpy conditions, even though the swell pushes up to 8ft on Tuesday – that’s a big, messy wall of water, experts only and even then, not pretty.
The best of the window looks like it’ll be Thursday, the 13th of August. The swell comes back around 6ft from the east, with a 12-second period and a cross-offshore breeze that keeps things clean. The energy is strong (1073), and the conditions are excellent for experienced surfers. This is the standout day. The wind stays light and the sets will have some grunt.
After that, things get a bit patchy again. The 14th and 15th are marginal at best, with onshore components and average quality. Sunday the 16th sees a massive spike in size – 10ft east swell – but the wind is cross-onshore. The energy is through the roof (3493), but it’s just too big and messy for Shida, which is an inconsistent spot that rarely handles that kind of size well. That’s a pass for paddle surfing, and honestly, that setup looks more interesting for kite surfing.
The final week is mostly a letdown. The 17th and 18th are blown out with strong onshore winds and poor conditions. There’s a tiny glimmer on Thursday the 20th afternoon with a clean 4ft east swell and cross-offshore wind, and then Friday the 21st morning looks glassy with a small 3ft south swell. That’s a nice little glassy session for the longboard or a fun fish, but it’s small. The rest of the week goes quiet again.
So, to sum it up: the clear standout is Thursday the 13th. Get on it if you can. Friday the 7th is also a good option for the experienced crew. The rest of the window is a mix of small, clean waves or blown-out, oversized lumps. Keep an eye on the forecasts, but don’t expect much action in that second week.
Rusty out.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 28°C on Fri morning, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 13mm), heaviest on Wed afternoon. Warm (max 26°C on Mon morning, min 23°C on Sun night). Winds increasing (light winds from the NE on Sun night, strong winds from the NNE by Tue afternoon). | ||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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) | S 13 | S 12 | S 12 | S 11 | S 11 | ESE 13 | ESE 14 | ESE 13 | ESE 13 | ESE 12 | E 12 | E 11 | ENE 11 | ENE 11 | E 10 | ENE 10 | ENE 10 | E 10 | E 11 |
Wave Graph | |||||||||||||||||||
1684 | 948 | 702 | 457 | 344 | 624 | 1053 | 998 | 917 | 876 | 997 | 872 | 1134 | 1463 | 510 | 370 | 168 | 235 | 610 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | cross-off | cross-off | off | cross-on | cross | on | cross-on | cross-on | on | on | cross-on | on | on | on | off |
High Tide | 12:32PM1.05m | 9:18PM1.39m | 10:24PM1.37m | 3:49PM1.28m | 11:59PM1.37m | 4:13PM1.35m | 1:26AM1.41m | 4:39PM1.40m | 2:34AM1.47m | 5:03PM1.43m | |||||||||
Low Tide | 4:28AM0.39m | 2:33PM1.04m | 5:54AM0.32m | 7:14AM0.22m | 7:20PM1.20m | 8:18AM0.12m | 8:39PM1.13m | 9:10AM0.04m | 9:28PM1.03m | 9:55AM0.01m | 10:09PM0.91m | ||||||||
— | 4:50 | — | — | 4:50 | — | — | 4:52 | — | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | |
6:37 | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:31 | — | — | 6:30 | — | |
mm | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 12 | 51 |
Temp °C | 27 | 28 | 28 | 26 | 28 | 27 | 25 | 27 | 26 | 24 | 26 | 26 | 24 | 26 | 26 | 23 | 26 | 23 | 26 |
Feels °C | 31 | 31 | 30 | 29 | 30 | 28 | 28 | 28 | 26 | 25 | 23 | 24 | 21 | 22 | 22 | 20 | 24 | 22 | 29 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 12 | S 12 | S 11 | ESE 10 | ESE 13 | ESE 14 | ESE 13 | ESE 13 | ESE 12 | E 12 | E 11 | E 11 | E 11 | E 10 | ENE 10 | ENE 10 | E 10 | E 11 |
1684 | 948 | 702 | 457 | 241 | 624 | 1053 | 998 | 917 | 876 | 997 | 872 | 850 | 878 | 510 | 370 | 168 | 235 | 610 | |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 9 | ESE 9 | ESE 9 | S 11 | S 11 | S 11 | S 10 | S 11 | S 10 | S 12 | S 11 | E 14 | S 12 | S 11 | S 11 | ESE 10 | SSW 11 | S 11 |
346 | 327 | 288 | 288 | 344 | 284 | 235 | 138 | 143 | 138 | 130 | 114 | 186 | 98 | 89 | 88 | 123 | 93 | 83 | |
Swell 3 Height (m) Direction Period (s) | E 15 | E 15 | E 15 | E 14 | E 14 | E 10 | — | — | SE 16 | SW 12 | SW 15 | SW 14 | S 10 | SW 12 | SW 12 | SE 13 | SSW 11 | NE 9 | NE 9 |
41 | 39 | 39 | 37 | 36 | 46 | — | — | 10 | 116 | 9 | 8 | 74 | 68 | 49 | 6 | 97 | 54 | 77 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | ENE 11 | ENE 11 | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | 1134 | 1463 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 17 | 70 | 17 | 63 | 63 | 85 | 214 | 155 | 81 | 74 | 74 | 208 |
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.











