Surf Forecasts:
Big Ben surf forecast from 26 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 3AM (local time) - 4ft (1.2m), 12s period, S swell with glassy winds.
- Most powerful swell: Thursday 3 Sep, 3AM (local time) - 5ft (1.5m), 12s period, S swell with 657 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 6PM (local time) - 2.5ft (0.8m), 13s period with E 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 Thursday (Aug 27) at 6PM. The primary swell is predicted to be 0.8m and 13s period with a secondary swell of 0.7m and 10s. Another secondary swell of 0.9m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Ben in the next 16 days are 1.5m 12s and forecast to arrive on Thursday (Sep 03) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Friday (Aug 28) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 27th Aug) | 2.5ft (0.8m) 13s |
| Best Surf | 3AM (Wed 2nd Sep) | 4ft (1.2m) 12s |
| Most Powerful | 3AM (Thu 3rd Sep) | 5ft (1.5m) 12s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's cookin' for Big Ben over the next couple of weeks.
Right off the bat, I gotta be straight with ya. The first few days are a bit of a struggle. We're looking at small, weak energy for a stretch. The swell is tiny, around 2ft from the east, and the combined energy is middling to weak (361 to 315). The wind is mostly cross or cross-off, which keeps things clean enough, but the waves are just too marginal for a proper session. Friday afternoon on the 28th of August shows the best of a lean period – still only 3ft from the east with a 12-second period, and the light WSW wind (12 mph) should give us a clean little wave. It’s a beginner-friendly spot, so it’s okay for a longboard or a foily but nothing to write home about.
Saturday the 29th and Sunday the 30th are a write-off. The swell drops even more and the wind gets messy. Sunday morning (30th of August) does have a moment of glassy conditions with maybe 2ft of east swell – combined energy is low (137) – but it's a very ordinary wave for the effort.
Then we hit a rough patch. From Sunday afternoon (30th of August) right through to early September, the conditions are pretty average. The wind is constantly cross or onshore, and even though the swell starts to push above 3ft on the 1st of September, it’s coming from the south, which isn't the optimum direction for Big Ben. The south-east facing breaks will see this, but it'll be lumpy and choppy. Not worth paddling out.
The only real standout in this entire 16-day run arrives on Thursday the 10th and Friday the 11th of September. This is where it gets interesting. We see a long-period south-southwest groundswell arriving, with a period of 14 seconds and swell heights around 5ft to 6ft. The combined energy is strong (around 1385 to 1477). Now, the cautious part: it's coming from the SSW, not the optimum SE direction, so this exposure will see a good amount of energy but the shape might be a bit straighter on this beach/jetty setup. The wind is forecast to be cross-shore, not perfect but workable. The 11th of September looks the best – morning session with a light NE breeze (12 mph) should be clean enough for a go. With the swell over 5ft, it's getting a bit much for absolute beginners, but it's the best offer of the whole outlook.
The rest of the second week fades back into small, poor-quality, onshore slop. Big Ben is a tough spot to rely on in this pattern; it tends to be inconsistent, and this run proves it. You gotta wait for that one window around the 10th and 11th.
This is Rusty, signing off.
Short Range ForecastModerate rain (total 14mm), heaviest on Thu afternoon. Warm (max 30°C on Thu morning, min 24°C on Thu afternoon). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Sun night. Warm (max 28°C on Sun morning, min 23°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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 12 | E 14 | E 13 | E 13 | E 12 | E 12 | E 12 | E 12 | E 11 | E 11 | E 11 | SW 6 | E 11 | S 12 | S 10 | S 10 | S 13 | S 12 | S 12 |
Wave Graph | |||||||||||||||||||
134 | 146 | 173 | 212 | 196 | 180 | 137 | 132 | 91 | 89 | 94 | 77 | 61 | 65 | 135 | 94 | 427 | 513 | 472 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross | cross-off | glassy | cross | cross-on | glassy | glassy | cross | cross | cross | cross | cross-off | cross | on | on |
High Tide | 3:40AM1.52m | 5:08PM1.52m | 4:23AM1.58m | 5:27PM1.54m | 5:03AM1.61m | 5:47PM1.54m | 5:42AM1.60m | 6:06PM1.55m | 6:21AM1.55m | 6:26PM1.55m | 7:02AM1.47m | 6:45PM1.54m | |||||||
Low Tide | 10:14PM0.89m | 10:28AM0.21m | 10:42PM0.76m | 10:59AM0.24m | 11:10PM0.64m | 11:29AM0.31m | 11:40PM0.54m | 11:57AM0.41m | 00:11AM0.46m | 12:23PM0.54m | 00:45AM0.42m | 12:48PM0.68m | 1:22AM0.41m | ||||||
— | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | |
6:15 | — | 6:14 | — | — | 6:13 | — | — | 6:10 | — | — | 6:09 | — | — | 6:08 | — | — | 6:07 | — | |
mm | 1 | 3 | 4 | 5 | 1 | — | — | — | — | — | — | — | 3 | — | — | — | — | — | 3 |
Temp °C | 27 | 30 | 28 | 26 | 28 | 28 | 26 | 28 | 27 | 26 | 28 | 28 | 27 | 25 | 26 | 24 | 28 | 28 | 26 |
Feels °C | 29 | 32 | 30 | 29 | 30 | 31 | 30 | 29 | 28 | 29 | 30 | 30 | 30 | 27 | 28 | 27 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SSE 9 | SSE 10 | S 11 | E 13 | E 12 | E 12 | E 12 | E 12 | E 11 | E 11 | SSW 6 | SSW 6 | E 11 | NE 8 | S 10 | S 10 | S 13 | S 12 | S 12 |
92 | 72 | 108 | 212 | 196 | 180 | 137 | 132 | 91 | 89 | 17 | 29 | 61 | 40 | 135 | 94 | 427 | 513 | 472 | |
Swell 2 Height (m) Direction Period (s) | SW 11 | S 11 | E 13 | S 10 | SSW 9 | S 8 | SSW 5 | SW 5 | SSE 11 | SE 10 | E 11 | E 12 | SSW 5 | E 11 | NE 8 | NE 8 | NE 8 | ENE 8 | E 12 |
123 | 88 | 173 | 90 | 82 | 35 | 26 | 14 | 47 | 27 | 94 | 67 | 15 | 58 | 51 | 57 | 60 | 80 | 411 | |
Swell 3 Height (m) Direction Period (s) | E 12 | E 14 | SW 10 | SSW 5 | SSE 10 | SSE 10 | SSE 10 | SSE 11 | SW 5 | SSW 8 | SE 10 | SE 10 | SE 10 | S 12 | E 10 | E 10 | E 10 | E 11 | SE 10 |
134 | 146 | 69 | 19 | 37 | 36 | 35 | 47 | 7 | 13 | 26 | 27 | 28 | 65 | 53 | 53 | 73 | 93 | 15 | |
Wind waves Height (m) Direction Period (s) | SW 5 | SW 5 | SW 5 | SW 5 | — | SW 6 | SW 5 | — | — | SW 4 | — | SW 6 | NE 4 | — | — | — | — | — | — |
63 | 55 | 57 | 32 | — | 31 | 47 | — | — | 14 | — | 77 | 8 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 81 | 35 | 35 | 30 | 2 | 0 | 0 | 35 | 81 | 0 | 0 | 39 | 18 | 29 | 29 | 0 | 6 | 29 | 29 |
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.











