Surf Forecasts:
Big Ben surf forecast from 30 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 12AM (local time) - 2.5ft (0.8m), 12s period, ESE swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 9AM (local time) - 5ft (1.6m), 14s period, S swell with 947 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 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 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. 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 1.6m 14s and forecast to arrive on Sunday (Sep 06) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 12s period and expected on Thursday (Sep 03) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 30th Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 12AM (Tue 1st Sep) | 2.5ft (0.8m) 12s |
| Most Powerful | 9AM (Sun 6th Sep) | 5ft (1.6m) 14s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s going on at Big Ben. It’s a beach-and-jetty spot that’s open to whatever comes in, and the water’s running about 82°, which is a touch warmer than normal for this time of year.
Right off the bat, Sunday the 30th has small 2ft waves from the east with an 11-second period, and a light cross-off wind in the morning. The combined swell energy is weak (109), so it’s clean but tiny. Nothing to get fired up about unless you’re just learning.
Monday the 31st is even smaller and messier with cross-shore winds and chop. Skip it.
Tuesday the 1st of September morning shows some hope – 3ft from the ESE at 12 seconds, combined energy climbing to moderate (316), and a light cross-off breeze keeping it clean. It’s the first real surfable moment, but still on the small side.
Wednesday the 2nd is the real highlight. Morning glass-off – 3 mph from the southeast, dead calm, with 3ft of east swell at 10 seconds. Combined energy is 282, still moderate, but glassy conditions mean it’ll be like butter. For a break that can be inconsistent, this is a sweet little window. The swell direction (east) isn’t a perfect match for the optimum SE, but when it’s glassy, you don’t argue.
From Wednesday afternoon, it goes downhill. The swell bumps up, but the period drops to 6 seconds and the wind turns onshore or cross-shore. Thursday the 3rd has 5ft from the SSE but with a 6-second period and moderate cross-shore winds – just lumpy, choppy junk. Combined energy hits 475, but with that period, it’s all chop. Same story through the end of the week.
Over the weekend of the 5th and 6th of September, the swell goes south and gets more power – up to 5ft on Sunday morning with a 14-second period, and combined energy spikes hard to 1682. That’s a lot of energy, but the wind is cross-shore from the northeast. The long period means better shape at a point or reef, but on a beach-and-jetty setup, it can break straight and get tricky. The conditions aren’t clean enough to call it good.
Monday the 7th of September morning offers the best shot in the second week – 6ft from the south at 13 seconds, combined energy 1400, and cross-off wind from the NNE keeping it clean. That’s a solid-sized swell with strong energy and decent wind. It’s a bit big for beginners (over 5ft), and the long period might make it tricky on the beach, but for an experienced surfer, this is the most promising window in the whole outlook. The south direction isn’t perfect for the jetty’s optimum SE, but there could be some good ones if you pick your spot.
Tuesday the 8th through Friday the 11th keep the south swell in the 5ft to 6ft range, but the wind is almost always cross-on or onshore, and the energy stays strong (800-1200+). The waves are there, but the wind wrecks them. By the 12th and 13th, the swell drops back under 3ft and the onshore winds stick around – a total write-off.
Monday the 14th of September shows 4ft from the SE with a 9-second period, cross-off winds from the NNE, and combined energy 281. It’s clean, but small and weak. A longboard might work, but nothing special.
The standout windows are Wednesday morning the 2nd of September for the glassy, clean small waves, and Monday the 7th of September morning for the bigger, more powerful swell with decent wind. Everything else is either flat, choppy, or both. Keep an eye on that 7th – but be ready for it to be a bit heavy for the jetty.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Tue morning, min 22°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Wed night. Warm (max 30°C on Fri morning, min 22°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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) | E 11 | E 12 | E 11 | ESE 14 | ESE 14 | ESE 12 | ESE 12 | E 11 | E 11 | E 10 | SE 6 | E 12 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SW 11 | SW 10 | SW 11 | S 16 | S 15 |
Wave Graph | |||||||||||||||||||||
66 | 67 | 61 | 68 | 145 | 208 | 232 | 295 | 242 | 167 | 146 | 214 | 165 | 161 | 125 | 90 | 75 | 65 | 71 | 260 | 846 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross | cross | cross-off | cross-off | cross-on | glassy | glassy | cross-on | cross-on | cross | cross-on | cross | cross | cross | off | cross-off | cross-off | cross-off |
High Tide | 6:06PM1.55m | 6:21AM1.55m | 6:26PM1.55m | 7:02AM1.47m | 6:45PM1.54m | 7:47AM1.35m | 7:06PM1.51m | 8:45AM1.23m | 7:27PM1.48m | 10:29AM1.12m | 7:48PM1.43m | 8:08PM1.35m | |||||||||
Low Tide | 11:57AM0.41m | 00:11AM0.46m | 12:23PM0.54m | 00:45AM0.42m | 12:48PM0.68m | 1:22AM0.41m | 1:09PM0.82m | 2:05AM0.43m | 1:26PM0.96m | 3:00AM0.47m | 1:21PM1.08m | 4:21AM0.52m | |||||||||
5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | |
— | 6:09 | — | — | 6:08 | — | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 5 | 1 | — | — | — | 2 | — | — | — | 4 |
Temp °C | 24 | 25 | 24 | 26 | 25 | 24 | 28 | 28 | 25 | 29 | 29 | 27 | 29 | 28 | 27 | 30 | 28 | 24 | 23 | 23 | 21 |
Feels °C | 27 | 28 | 27 | 28 | 26 | 26 | 31 | 32 | 30 | 33 | 32 | 30 | 30 | 29 | 29 | 33 | 32 | 26 | 23 | 23 | 19 |
Swell 1 Height (m) Direction Period (s) | ENE 5 | E 5 | E 11 | E 11 | ESE 14 | ESE 12 | ESE 12 | E 11 | E 11 | ESE 7 | E 10 | SE 7 | SSE 6 | E 10 | E 10 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 7 | S 15 |
24 | 19 | 61 | 59 | 145 | 208 | 232 | 295 | 242 | 88 | 98 | 140 | 145 | 98 | 69 | 90 | 66 | 52 | 45 | 62 | 846 | |
Swell 2 Height (m) Direction Period (s) | E 11 | E 12 | ENE 5 | SE 9 | E 11 | E 11 | ENE 6 | ENE 6 | E 7 | E 10 | E 13 | E 12 | E 11 | SW 12 | SSW 8 | E 10 | E 9 | E 9 | ENE 6 | S 16 | ENE 8 |
66 | 67 | 7 | 31 | 57 | 59 | 27 | 20 | 74 | 167 | 50 | 214 | 141 | 23 | 24 | 65 | 62 | 41 | 35 | 260 | 111 | |
Swell 3 Height (m) Direction Period (s) | SW 6 | SW 6 | SE 10 | ESE 14 | SE 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SE 10 | SSW 8 | SE 10 | SW 11 | SW 12 | SW 11 | SW 10 | SW 11 | ENE 6 | SSE 8 |
19 | 14 | 26 | 68 | 30 | 14 | 14 | 14 | 14 | 27 | 26 | 17 | 24 | 15 | 31 | 47 | 75 | 65 | 71 | 22 | 45 | |
Wind waves Height (m) Direction Period (s) | — | — | — | NE 7 | ENE 5 | ENE 5 | NE 6 | — | — | — | SE 6 | S 6 | SSE 6 | SSE 6 | SSE 6 | NNE 4 | NE 5 | — | SSE 6 | SSW 4 | NE 8 |
— | — | — | 21 | 52 | 49 | 43 | — | — | — | 146 | 62 | 165 | 161 | 125 | 1 | 32 | — | 64 | 23 | 122 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 6 | 0 | 184 | 35 | 0 | 0 | 29 | 0 | 0 | 30 | 30 | 121 | 561 | 121 | 35 | 6 | 0 | 22 | 184 | 184 |
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.











