Surf Forecasts:
Big Ben surf forecast from 23 Aug 2026:
- Best quality surf: Monday 24 Aug, 9AM (local time) - 4.5ft (1.3m), 14s period, SSE swell with glassy winds.
- Most powerful swell: Monday 24 Aug, 3PM (local time) - 6.5ft (2.0m), 16s period, SSE swell with 1,982 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 3AM (local time) - 3ft (0.9m), 12s period with SSE swell.
Best Forecast Surf Conditions for Big Ben this week:
The surf forecast for Big Ben over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 24) at 3AM. The primary swell is predicted to be 0.9m and 12s period with a secondary swell of 0.7m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 2.0m 16s and forecast to arrive on Monday (Aug 24) at 3PM. 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 29) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 24th Aug) | 3ft (0.9m) 12s |
| Best Surf | 9AM (Mon 24th Aug) | 4.5ft (1.3m) 14s |
| Most Powerful | 3PM (Mon 24th Aug) | 6.5ft (2.0m) 16s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, let’s get into it. This is Rusty, and I’m lookin’ at the next couple of weeks for Big Ben.
First thing, I gotta be straight with you – this stretch is a real mixed bag, and honestly, it’s a bit of a grind. The first few days have some size, but the wind is a constant battle. The standout moment, the one that’s got my heart beating a little faster, is that Monday morning session on the 7th of September. That’s the one to circle.
Alright, let’s start from the beginning. We kick off on Monday morning, the 24th of August. There’s a solid, long-period groundswell from the SSE, pushing in at 3ft with a period of 18 seconds. That’s some serious energy for the beach break, with a combined energy reading of 1390. The wind is glassy out of the SSW, which is a dream for clean conditions. This is a session for the experienced crew, though – that long period swell can make a beach break a bit tricky, but the quality is there. The afternoon sees the wind pick up and go cross-shore, and the swell jumps to 7ft, but the quality drops off fast with the wind.
Tuesday through to the end of the month, it’s a bit of a write-off. The wind stays on it, mostly cross or cross-off, but the swell is all over the place. A few mornings look clean, like Wednesday the 26th with a 4ft swell and clean cross-off wind, but the energy is low and the quality is just not there. We get a bit of a lull over the weekend, with tiny waves in the 2ft to 3ft range and messy conditions.
The first week of September doesn’t look much better. There’s a run of poor conditions with onshore winds and small, weak swell. The exception is that Monday morning on the 7th of September. We’ve got a 4ft groundswell from the S, with a 12-second period, and the wind is glassy out of the ENE again. The combined energy is 700, and the forecast is for very good surf conditions. This is the session to aim for – clean, glassy waves that’ll be a joy to ride. The rest of that day is iffy, and Tuesday the 8th looks like we’re back to the same old story.
So, overall, the best bet is that Monday morning, the 7th of September. It’s a bit of a wait, but it’s a genuine standout. The rest of the period is mostly a struggle with the wind, but that one morning makes it worth holding out for.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Wed morning, min 25°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 29mm), heaviest during Thu night. Warm (max 30°C on Thu morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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) | SSE 13 | SSE 14 | SSE 16 | SSE 13 | SSE 13 | S 12 | S 12 | S 12 | SSW 13 | SW 12 | SSW 6 | E 13 | E 13 | E 12 | E 12 | E 12 | E 12 | SSW 10 | E 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 209 | 670 | 1982 | 968 | 1092 | 1065 | 723 | 404 | 469 | 683 | 102 | 173 | 212 | 193 | 139 | 134 | 98 | 93 | 101 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross | cross | cross | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross | cross |
High Tide | 00:01AM1.29m | 4:16PM1.41m | 1:46AM1.34m | 4:31PM1.46m | 2:51AM1.43m | 4:50PM1.50m | 3:40AM1.52m | 5:08PM1.52m | 4:23AM1.58m | 5:27PM1.54m | 5:03AM1.61m | 5:47PM1.54m | |||||||
Low Tide | 8:26AM0.35m | 9:17PM1.13m | 9:13AM0.27m | 9:46PM1.02m | 9:53AM0.22m | 10:14PM0.89m | 10:28AM0.21m | 10:42PM0.76m | 10:59AM0.24m | 11:10PM0.64m | 11:29AM0.31m | 11:40PM0.54m | |||||||
 |  | |  | | | | | | |  | |  | | | | |  |  | |
 | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — |
 | 6:19 | — | 6:17 | — | — | 6:16 | — | — | 6:15 | — | — | 6:14 | — | — | 6:13 | — | — | 6:10 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 6 | 14 | 1 | — | 2 | 4 | 1 | — |
Temp °C | 25 | 29 | 29 | 26 | 29 | 28 | 26 | 30 | 29 | 27 | 30 | 28 | 24 | 28 | 28 | 26 | 27 | 24 | 23 |
Feels °C | 30 | 32 | 31 | 29 | 30 | 28 | 26 | 32 | 30 | 29 | 32 | 31 | 27 | 29 | 29 | 28 | 31 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SSE 13 | SSE 14 | SSE 16 | SSE 13 | SSE 13 | S 12 | S 12 | S 12 | SSW 13 | SSE 9 | SW 11 | E 13 | E 13 | S 7 | SSW 7 | SSW 6 | E 12 | SSW 10 | E 12 |
| kJ | 209 | 621 | 1982 | 968 | 1092 | 1065 | 723 | 404 | 469 | 92 | 96 | 173 | 212 | 109 | 77 | 46 | 98 | 81 | 101 |
Swell 2 Height (m) Direction Period (s) | E 12 | SSE 18 | E 12 | S 15 | S 16 | E 13 | E 13 | SSE 9 | SSE 9 | E 12 | E 14 | S 10 | SW 11 | E 12 | E 12 | E 12 | SSW 6 | E 11 | SSW 9 |
| kJ | 104 | 670 | 175 | 894 | 406 | 225 | 215 | 110 | 119 | 98 | 102 | 72 | 75 | 193 | 139 | 134 | 27 | 93 | 53 |
Swell 3 Height (m) Direction Period (s) | E 9 | E 12 | SSW 8 | E 11 | E 14 | — | SSE 10 | E 12 | E 12 | S 12 | SSE 10 | SSE 10 | S 9 | SW 10 | SE 10 | SW 9 | SW 9 | SSE 11 | SSE 10 |
| kJ | 59 | 99 | 7 | 114 | 311 | — | 40 | 148 | 141 | 71 | 55 | 38 | 41 | 35 | 23 | 29 | 30 | 47 | 42 |
Wind waves Height (m) Direction Period (s) | — | — | SW 9 | SW 3 | SW 4 | SW 4 | SW 5 | SW 4 | SW 4 | SW 12 | SSW 6 | SSW 5 | SSW 6 | SSW 6 | — | SW 5 | NE 2 | NE 5 | NE 6 |
| kJ | — | — | 29 | 9 | 15 | 29 | 47 | 22 | 31 | 683 | 100 | 95 | 110 | 126 | — | 29 | 2 | 38 | 46 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 35 | 70 | 70 | 534 | 35 | 38 | 561 | 35 | 34 | 18 | 6 | 35 | 273 | 0 | 0 | 29 | 6 |
Best forecast wave conditions in Chiba | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
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Information about the Big Ben Surf forecast
The above surf forecast table for Big Ben provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Big Ben can be found by selecting the local surf guide option on the grey menu. Our Big Ben 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 (Big Ben) 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 Big Ben 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.
Big Ben is 3 km (2 miles) from Kawaguchi. If you plan a holiday in Chiba, look for hotels and other accommodation in Kawaguchi. Kawaguchi has rooms for a wide range of budgets as well as car hire and transport links.
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