Surf Forecasts:
Shida surf forecast from 15 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 9PM (local time) - 2.5ft (0.8m), 9s period, ENE swell with cross-offshore winds.
- Most powerful swell: Saturday 15 Aug, 9PM (local time) - 5ft (1.5m), 10s period, ESE swell with 391 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 3AM (local time) - 3ft (0.9m), 8s 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 Tuesday (Aug 18) at 3AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Shida in the next 16 days are 1.5m 10s and forecast to arrive on Saturday (Aug 15) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Aug 22) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 18th Aug) | 3ft (0.9m) 8s |
| Best Surf | 9PM (Tue 18th Aug) | 2.5ft (0.8m) 9s |
| Most Powerful | 9PM (Sat 15th Aug) | 5ft (1.5m) 10s |
Table - best surf conditions forecast for Shida over the next 16 days.
The Lowdown
Alright, let's see what’s cookin'.
Honestly, the next week or so is pretty quiet for Shida. We’re lookin’ at a stretch of small, cross-shore, and often ordinary conditions right through till around Friday the 21st. A few afternoons do clean up a little, like Tuesday the 18th and Thursday the 20th, but those waves are only around 3 ft to 3 ft and pretty weak, with energy around that 160-174 mark. Not much to get excited about. Friday morning the 21st goes glassy with the wind light out of the SE, but again, tiny and gutless.
The real story fires up on Sunday the 23rd. That’s when things change. The swell bumps up to 6 ft to 7 ft from the SSW, period around 6-7 seconds, and we get clean offshore winds. Energy jumps to 494-556. That afternoon is lookin’ very good for a surf.
But the standout – and I mean the real standout – is Monday the 24th. We got a solid SSE groundswell, 5 ft in the morning building to a solid 8 ft in the afternoon, with a very long period of 16-17 seconds. That’s proper groundswell, and the numbers back it up: 1313 in the morning and a massive 4472 in the afternoon. Toss in clean, gentle offshore winds from the south, and you’ve got excellent, powerful surf for experienced surfers. This is the pick of the whole forecast, but with swell over 8 ft, it ain’t for beginners. That long period will make it a bit straight at the beach, but on a reef or point, it’d be unreal.
Tuesday the 25th and Wednesday the 26th see the swell get even bigger – 10 ft to 12 ft – but the notes say it’s just too big for this break. The energy is crazy, over 3800-4500, but it’s more of a show than a go for most. Wind and tide are fine, but the waves are overwhelming.
After that, it drops off hard. From Thursday the 27th onward, we get messy cross-onshore winds, dropping swell, and poor conditions through to the end of the month. The 29th and 30th have some cross-off wind but the swell is tiny (2 ft-3 ft) and the wind is fresh to strong, with thunderstorms possible.
In short: The next week is small and ordinary. Sunday the 23rd is the turn-around, and Monday the 24th is the absolute highlight – big, clean, powerful swell for those who can handle it. After that, it’s a wipeout for a few days.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sat night. Warm (max 27°C on Tue morning, min 23°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Tue afternoon, min 24°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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 10 | ESE 9 | E 9 | E 8 | E 9 | E 9 | E 8 | ESE 8 | E 8 | SE 8 | SE 7 | ESE 7 | E 7 | E 7 | E 7 | E 8 | ESE 7 | ESE 7 | ESE 7 | ESE 8 |
Wave Graph | ||||||||||||||||||||
391 | 308 | 256 | 200 | 230 | 181 | 144 | 115 | 86 | 69 | 73 | 84 | 74 | 106 | 88 | 118 | 125 | 99 | 108 | 93 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross | cross-off | cross | cross-off | off | glassy | cross-off | glassy |
High Tide | 6:09PM1.47m | 5:56AM1.42m | 6:30PM1.47m | 6:42AM1.33m | 6:50PM1.46m | 7:30AM1.22m | 7:11PM1.44m | 8:25AM1.11m | 7:33PM1.41m | 9:44AM1.02m | 7:57PM1.37m | 8:28PM1.31m | ||||||||
Low Tide | 00:04AM0.55m | 12:10PM0.38m | 00:42AM0.48m | 12:36PM0.53m | 1:22AM0.44m | 12:59PM0.68m | 2:06AM0.43m | 1:18PM0.81m | 2:56AM0.45m | 1:27PM0.93m | 4:02AM0.48m | |||||||||
— | — | 4:56 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | |
6:28 | — | — | 6:27 | — | — | 6:25 | — | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | |
mm | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 24 | 26 | 26 | 25 | 26 | 26 | 25 | 27 | 27 | 25 | 27 | 27 | 25 | 27 | 26 | 25 | 27 | 27 | 26 |
Feels °C | 26 | 25 | 26 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 28 | 27 | 29 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 9 | E 9 | S 8 | E 9 | E 9 | E 8 | ESE 8 | E 8 | SE 8 | SE 7 | ESE 7 | E 9 | E 7 | E 7 | E 8 | ESE 7 | ESE 7 | SE 10 | ESE 8 |
391 | 308 | 256 | 35 | 230 | 181 | 144 | 115 | 86 | 69 | 73 | 84 | 23 | 106 | 88 | 118 | 125 | 99 | 37 | 93 | |
Swell 2 Height (m) Direction Period (s) | S 10 | S 9 | SSW 9 | ESE 9 | S 9 | SSW 8 | SE 11 | SE 10 | SE 7 | E 8 | E 9 | E 9 | SE 10 | SE 10 | SE 11 | SE 11 | SE 11 | SE 11 | S 8 | SSW 8 |
53 | 41 | 27 | 35 | 23 | 24 | 30 | 38 | 30 | 64 | 56 | 23 | 35 | 36 | 40 | 40 | 40 | 40 | 18 | 19 | |
Swell 3 Height (m) Direction Period (s) | SSE 9 | SE 10 | ESE 9 | SE 11 | SE 11 | SE 11 | SSW 8 | SSW 8 | SE 10 | SE 10 | SE 10 | SE 10 | SSW 8 | SSE 6 | SSW 9 | SSW 9 | S 8 | S 8 | SE 15 | SE 10 |
15 | 27 | 32 | 32 | 31 | 30 | 23 | 13 | 36 | 27 | 26 | 25 | 6 | 4 | 8 | 16 | 21 | 18 | 9 | 35 | |
Wind waves Height (m) Direction Period (s) | — | — | — | E 8 | — | — | — | — | — | — | — | ENE 9 | E 7 | — | — | SSE 6 | — | — | ESE 7 | S 4 |
— | — | — | 200 | — | — | — | — | — | — | — | 65 | 74 | — | — | 3 | — | — | 108 | 7 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 74 | 17 | 63 | 115 | 63 | 63 | 63 | 1 | 17 | 0 | 0 | 17 | 63 | 0 | 70 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.











