Surf Forecasts:
Shida surf forecast from 21 Aug 2026:
- Best quality surf: Monday 24 Aug, 6AM (local time) - 5.5ft (1.7m), 19s period, SSE swell with glassy winds.
- Most powerful swell: Monday 24 Aug, 9AM (local time) - 6.5ft (2.0m), 18s period, SSE swell with 2,357 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 12PM (local time) - 1.5ft (0.4m), 11s 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 Friday (Aug 21) at 12PM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.5m and 8s. Another secondary swell of 0.5m and 8s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Shida in the next 16 days are 2.0m 18s and forecast to arrive on Monday (Aug 24) at 9AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Saturday (Aug 22) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Fri 21st Aug) | 1.5ft (0.4m) 11s |
| Best Surf | 6AM (Mon 24th Aug) | 5.5ft (1.7m) 19s |
| Most Powerful | 9AM (Mon 24th Aug) | 6.5ft (2.0m) 18s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s talk about Shida in feet and knots. The next couple of weeks have some real gems, but you gotta pick your moments.
Friday the 21st is a total dud. Waves are about 1ft from the SE, period 11 seconds, water temp 80° – pretty normal for the season. The energy is weak, and it’s barely breaking.
Saturday the 22nd shows a little life. Morning has 3ft from the E (11 seconds), still weak. By afternoon it’s 3ft from the E, 11 seconds, with light cross-off wind. The report says “expect good surf conditions.” It’s a small, clean wave – good for a fun log.
Sunday the 23rd is trash – onshore wind, poor conditions.
Now, here’s the big one. Monday the 24th, Shida is pumping. We’ve got 7ft from the SSE, and the period is a very long 18 seconds – proper groundswell. The energy is huge. The wind in the morning is glassy – dead calm. That’s as perfect as it gets. In the afternoon, it’s offshore from the south at 9 mph. This is for experts only. 7ft on a long-period swell at a beach break will be heavy and powerful.
Tuesday the 25th has 8ft from the SSE, period dropping to 14 seconds. Winds are cross-off, clean but the reports say “marginal” – maybe a little lumpy. Still a solid size for a strong surfer.
Wednesday and Thursday the 26th–27th drop down to 5ft to 3ft, with onshore wind. Not worth it.
Friday the 28th gets blown out with 22 mph wind and rain. The swell jumps to 6ft from the SSW but it’s short period (9 seconds) – messy windswell.
The weekend of the 30th–31st is small again, 4ft to 4ft from the SE with light cross-on breezes. The afternoon of the 31st has a cleaner cross-off breeze and 4ft SE swell – rideable but average.
Tuesday September 1st is a good session: 4ft SE swell (11 seconds) with light offshore wind. The report says “expect very good surf conditions.” Clean, chest-high fun.
The next standout is Wednesday September 2nd. Shida gets a serious pulse: 7ft from the ESE with a 12-second period, and wind is offshore from the SSW at 12–16 mph. The energy is strong. This is an excellent session for advanced surfers.
Now, a warning: Thursday September 3rd goes huge – 33ft from the ESE with an 18-second period. The reports say it’s too big for this break. Stay out of the water.
Friday the 4th is still massive (18ft to 11ft) and messy with rain and onshore wind. Not surfable.
Saturday the 5th drops to 5ft–7ft from the ESE, but it’s cross-shore and choppy, only marginal.
Best calls: Monday August 24th (glassy 7ft SSE groundswell) and Wednesday September 2nd (offshore 7ft ESE). Both for experienced crew only. Tuesday September 1st is a clean, smaller backup. Don’t bother with the rest.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sat morning. Warm (max 28°C on Fri morning, min 23°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue night. Warm (max 29°C on Tue morning, min 25°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | S 9 | SE 10 | E 9 | E 11 | E 11 | E 10 | E 9 | ENE 9 | SSE 13 | SSE 18 | SSE 15 | SSE 14 | SSE 14 | S 14 | S 13 | S 13 | SSW 12 | SSE 9 | SSE 8 | E 14 | E 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 40 | 39 | 41 | 151 | 233 | 198 | 83 | 110 | 210 | 2357 | 1804 | 2020 | 2012 | 2127 | 1391 | 747 | 254 | 211 | 212 | 249 | 222 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 8:28PM1.31m | 9:26PM1.25m | 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 | ||||||||||
Low Tide | 5:32AM0.48m | 6:59AM0.43m | 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 | ||||||||||
 |  |  |  | |  | | |  | | | | | | | |  | | |  |  | |
 | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — |
 | — | 6:21 | — | — | 6:19 | — | — | 6:17 | — | — | 6:16 | — | — | 6:15 | — | — | 6:14 | — | — | 6:13 | — |
mm | — | — | — | 1 | 2 | 2 | — | — | — | — | — | — | — | — | 1 | 1 | — | — | 1 | 1 | 13 |
Temp °C | 28 | 28 | 26 | 28 | 27 | 24 | 26 | 26 | 24 | 27 | 27 | 26 | 29 | 28 | 27 | 29 | 29 | 27 | 27 | 25 | 25 |
Feels °C | 29 | 29 | 28 | 30 | 31 | 27 | 27 | 27 | 27 | 29 | 29 | 28 | 31 | 29 | 29 | 29 | 30 | 29 | 29 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 9 | E 11 | E 11 | E 10 | E 9 | SSE 12 | SSE 13 | SSE 18 | SSE 15 | SSE 14 | SSE 14 | S 14 | S 13 | S 13 | SSE 9 | SSE 9 | SSW 12 | SSW 11 | SSE 10 |
| kJ | 34 | 35 | 41 | 151 | 233 | 198 | 83 | 104 | 209 | 2357 | 1804 | 2020 | 2012 | 2127 | 1391 | 747 | 254 | 211 | 145 | 249 | 183 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 8 | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | ESE 12 | E 9 | E 12 | SSE 19 | E 11 | ESE 14 | ESE 13 | ESE 13 | SSE 10 | SSW 12 | SSW 11 | E 15 | SSE 10 | SSW 10 |
| kJ | 39 | 37 | 38 | 28 | 27 | 26 | 15 | 56 | 78 | 134 | 657 | 84 | 258 | 184 | 176 | 175 | 254 | 88 | 155 | 183 | 136 |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | S 4 | SE 10 | SSW 8 | SSE 19 | ESE 16 | E 12 | S 20 | SW 10 | SW 10 | E 19 | ESE 12 | ESE 12 | E 12 | ESE 10 | E 14 | E 13 |
| kJ | 40 | 39 | 36 | 25 | 28 | 6 | 16 | 24 | 210 | 25 | 137 | 188 | 15 | 15 | 7 | 117 | 111 | 99 | 57 | 232 | 222 |
Wind waves Height (m) Direction Period (s) | SSE 4 | S 3 | S 4 | S 5 | S 5 | NE 3 | NE 4 | ENE 9 | — | — | — | SW 9 | — | — | — | SSE 9 | — | — | SSE 8 | — | S 8 |
| kJ | 7 | 6 | 12 | 22 | 22 | 3 | 4 | 110 | — | — | — | 29 | — | — | — | 220 | — | — | 212 | — | 127 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 7 | 0 | 7 | 1 | 0 | 3 | 27 | 63 | 3 | 0 | 0 | 0 | 91 | 565 | 104 | 91 | 147 | 0 | 104 | 1301 | 565 |
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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