Surf Forecasts:
Izumi surf forecast from 30 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 9PM (local time) - 3ft (0.9m), 12s period, ESE swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 3AM (local time) - 8ft (2.5m), 8s period, E swell with 970 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 9PM (local time) - 1.5ft (0.5m), 11s period with E swell.
Best Forecast Surf Conditions for Izumi this week:
The surf forecast for Izumi over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 30) at 9PM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.4m and 5s. Another secondary swell of 0.5m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Izumi in the next 16 days are 2.5m 8s and forecast to arrive on Sunday (Sep 06) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Tuesday (Sep 01) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 30th Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 9PM (Tue 1st Sep) | 3ft (0.9m) 12s |
| Most Powerful | 3AM (Sun 6th Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Izumi over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a proper look at what’s coming down the line for Izumi.
Right off the bat, we’ve got a bit of a slow start. The first real chance to get wet comes up on Sunday afternoon, the 30th of August. Now, don’t get your hopes up too high, it’s a small one. We’re looking at a 2ft easterly swell with a nice long 11-second period, so there’s a bit of groundswell energy in the water, but it’s weak stuff (combined energy of 119). The water is a touch warmer than normal at 82°, which is a bit of a treat. The wind is a light cross-offshore breeze, which will keep the surface clean. It’s surfable, but it’s very ordinary.
The next morning, Monday the 31st, is a write-off. The wind picks up to a moderate breeze, and while the swell holds at 2ft, the conditions are just poor. Tuesday the 1st of September shows a slight bump in size to 3ft from the ESE, with a period of 12 seconds, giving a moderate wave energy (252). The wind is a cross-off, clean on the morning, but the forecast says it’s marginal. Still, if you’re desperate, you might find a ripple.
From Wednesday the 2nd through to the end of the first week, the wind turns onshore and the quality drops right off. The swell gets a bit bigger, hitting 5ft on Friday afternoon, but it’s a short-period 6-second windswell, choppy and lumpy. The energy is moderate (229), but the conditions are just poor. Not worth paddling out for.
The second week kicks off with a bang, but it’s a dangerous one. On Saturday the 5th of September, the swell jumps to 6ft from the east, with a short period, and the energy is strong (368). By Sunday the 6th, we’re looking at 8ft, and the energy is very strong (1114). The wind is cross-shore and fresh, so it’s going to be lumpy and messy. This is big, raw, and ugly. Definitely not for beginners, and even for the experienced crew, it’s going to be a battle.
The real standout, and the only one I’d get excited about, is Wednesday the 9th of September. But here’s the catch. The swell is predicted to be too big for this break. We’re talking a massive 13ft swell from the SSE with a long 12-second period, producing enormous energy (4843). The wind is cross-offshore, which would make it clean, but at this size, Izumi is simply not safe. This is expert-only territory, and even then, it’s a monster. If you’re a seasoned charger and know the river, this might be your day, but for everyone else, stay on the beach.
Thursday the 10th is similar, with a 15ft swell from the SE and a 13-second period, creating a colossal energy (7546). The wind is a strong cross-off, so it’s clean, but again, it’s way too big. The forecasts say the wind and tide are favorable, but the swell is just too much for the break.
After that, the size drops off quickly but the wind stays brutal. Friday the 11th and Saturday the 12th are blown out with strong offshore winds, making it clean but the swell is messy and the energy is dropping. By Sunday the 13th, the wind eases to a gentle breeze, and we get a 4ft swell from the ENE with a 10-second period, but the energy is moderate (496). The forecast is still marginal. Monday the 14th is a similar story, with a 4ft southerly swell, short period, and light cross-on breezes.
So, the honest truth is, there’s no perfect window here. The best on offer for the average surfer is probably that first Sunday afternoon, the 30th of August, for a tiny, clean, but very ordinary session. The big swell in the second week is a spectacle, but it’s dangerous and not for the faint of heart.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Tue morning, min 23°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 34mm), heaviest during Sat morning. Warm (max 29°C on Thu morning, min 20°C on Sat morning). Winds increasing (light winds from the WNW on Thu night, fresh winds from the NE by Sat morning). | |||||||||||||||||||
Sun 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||
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 11 | E 11 | E 11 | ESE 14 | ESE 12 | ESE 12 | ESE 11 | ESE 11 | ESE 10 | ESE 10 | ESE 11 | E 10 | S 8 | SSE 6 | SSE 6 | ENE 6 | ENE 6 | E 7 | NE 7 | E 8 |
Wave Graph | ||||||||||||||||||||
60 | 57 | 57 | 73 | 175 | 193 | 214 | 170 | 116 | 111 | 121 | 73 | 84 | 94 | 75 | 139 | 122 | 316 | 278 | 815 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | glassy | cross-on | cross-on | cross | cross-on | cross-on | off | cross-off | cross | cross | cross | cross | cross-off |
High Tide | 5:43PM1.41m | 5:50AM1.39m | 6:02PM1.43m | 6:34AM1.32m | 6:22PM1.43m | 7:23AM1.23m | 6:45PM1.43m | 8:25AM1.12m | 7:09PM1.41m | 10:11AM1.03m | 7:37PM1.37m | 8:16PM1.31m | ||||||||
Low Tide | 11:48PM0.43m | 11:56AM0.44m | 00:24AM0.36m | 12:21PM0.57m | 1:03AM0.32m | 12:45PM0.72m | 1:48AM0.31m | 1:05PM0.86m | 2:46AM0.34m | 1:09PM0.98m | 4:06AM0.36m | |||||||||
— | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | |
6:08 | — | — | 6:07 | — | — | 6:06 | — | — | 6:05 | — | — | 6:02 | — | — | 6:01 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | 9 | 19 | 5 | 3 |
Temp °C | 24 | 24 | 25 | 25 | 24 | 27 | 26 | 25 | 27 | 28 | 27 | 29 | 29 | 27 | 23 | 24 | 23 | 21 | 21 | 21 |
Feels °C | 26 | 27 | 26 | 26 | 25 | 29 | 28 | 29 | 29 | 30 | 31 | 30 | 30 | 30 | 22 | 23 | 22 | 18 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | E 5 | E 11 | E 11 | ESE 14 | ESE 12 | ESE 12 | ESE 11 | ESE 11 | ESE 10 | ESE 10 | ESE 11 | SE 6 | SE 6 | E 10 | SSE 6 | SSE 6 | SSE 6 | S 8 | ESE 8 | SSE 12 |
18 | 57 | 57 | 73 | 175 | 193 | 214 | 170 | 116 | 111 | 121 | 38 | 40 | 67 | 75 | 41 | 13 | 12 | 226 | 184 | |
Swell 2 Height (m) Direction Period (s) | E 11 | ENE 5 | SE 9 | E 11 | E 11 | NE 6 | ENE 6 | E 7 | E 7 | E 6 | SSW 8 | E 10 | E 10 | SSW 8 | E 9 | ESE 9 | SE 9 | SSE 16 | SSE 14 | SSE 15 |
60 | 7 | 22 | 56 | 36 | 35 | 31 | 44 | 44 | 41 | 22 | 73 | 71 | 14 | 42 | 28 | 28 | 26 | 80 | 133 | |
Swell 3 Height (m) Direction Period (s) | SSW 7 | SSW 7 | NE 7 | SE 9 | SSW 9 | SSW 8 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | E 10 | E 13 | SSW 9 | SW 10 |
21 | 10 | 16 | 22 | 16 | 24 | 25 | 14 | 22 | 22 | 15 | 15 | 25 | 23 | 21 | 21 | 30 | 14 | 15 | 25 | |
Wind waves Height (m) Direction Period (s) | ENE 5 | NE 4 | NE 4 | NE 6 | NE 5 | NE 6 | — | — | — | — | SE 6 | S 8 | S 8 | SSE 6 | NE 5 | ENE 6 | ENE 6 | E 7 | NE 7 | E 8 |
20 | 9 | 9 | 45 | 57 | 68 | — | — | — | — | 52 | 64 | 84 | 94 | 47 | 139 | 122 | 316 | 278 | 815 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 29 | 69 | 15 | 15 | 15 | 0 | 3 | 3 | 4 | 3 | 3 | 0 | 62 | 62 | 216 | 254 | 579 | 86 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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Information about the Izumi Surf forecast
The above surf forecast table for Izumi provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Izumi can be found by selecting the local surf guide option on the grey menu. Our Izumi 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 (Izumi) 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 Izumi 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.
Izumi is 7 km (4 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.











