
Surf Forecasts:
Big Ben surf forecast from 8 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 9PM (local time) - 8ft (2.5m), 9s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 9AM (local time) - 10ft (3.0m), 8s period, SSW swell with 1,051 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 9PM (local time) - 8ft (2.5m), 9s period with SSW 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 Wednesday (Sep 09) at 9PM. The primary swell is predicted to be 2.5m and 9s period with a secondary swell of 2.1m and 9s. Another secondary swell of 0.3m and 9s 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 3.0m 8s and forecast to arrive on Wednesday (Sep 09) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 9th Sep) | 8ft (2.5m) 9s |
| Best Surf | 9PM (Wed 9th Sep) | 8ft (2.5m) 9s |
| Most Powerful | 9AM (Wed 9th Sep) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, folks, let's get real about what's on the menu for the next couple of weeks. It's a mixed bag, a real tug-of-war between some sizable but messy south swell and some cleaner, smaller east energy. The saving grace is that the winds are looking pretty decent, so if you're willing to pick your moments, there are waves to be had. Don't expect a non-stop party, but it's not a total dead spell either. We've got a rough start ahead with a lot of chop and wind, so you'll have to be patient before things clean up.
The First Few Days: Choppy and Messy
The first couple of afternoons and the following morning, we've got some beefy swell hitting the beach, but the wind is just tearing it apart. Tuesday afternoon has a solid 5.6ft of south swell with a 9-second period, but that cross-on breeze is making it a choppy mess. There's moderate energy in the water (541), but the quality is poor. It's one of those times you look out and just shake your head.
Wednesday morning brings even more size, with a 9.8ft southwest swell, but the wind is cross-shore and it's lumpy and rough. The energy is strong (1166) and the period is short at 8 seconds, so it's going to be sectiony and challenging. This one is well overhead, so it's only for the experts, and even they might be struggling.
Finally, Some Cleaner Surf (but Small): Sep 10 - Sep 15
Thursday is a bit of a relief. The swell drops to 4.3ft from the south, and the wind turns offshore from the NNE, giving us clean conditions. It might be a bit walled, but it's not the choppy mess we've had. It's called "marginal," but there will be some waves to be had, especially in the morning.
Then things get interesting. From Friday morning through Saturday, the wind stays offshore and light, but the swell drops way off and shifts east. We're looking at small 2ft waves, but the period jumps up to 13-14 seconds. That's very long-period groundswell, and for a beach/jetty break, it can be tricky. It might run a bit straight and lack push. The energy is weak (290-374), but the conditions are clean. If you've got a longboard, this could be your best chance for a fun, mellow session.
Sunday keeps the clean theme with light winds and small east swell around 3ft. The early morning glass is your best bet. It's still that long 13-second period, so be ready for long lulls between sets. Monday morning sees a bump in size back to 4ft from the southeast, but the wind swings onshore and it gets bumpy again.
Now, Tuesday morning is a standout for this period. It's glassy with no wind, and there's 3ft of east swell with a 13-second period. The energy is moderate (497). This is the cleanest it's going to be for a while, a true glassy morning with clean little waves. It's small, but the quality will be the best of the week.
Mid-Range: More Size, But Onshore Winds: Sep 17 - Sep 21
We get a break from the onshore wind on Thursday morning, with heavy rain and glassy conditions. The swell drops to 3ft from the southeast, with a short 8-second period and weak energy (218). It'll be clean but pretty gutless. Another window for the longboard if you don't mind getting wet.
From Friday onwards, we get the next push of energy, but it's more of a windswell from the northeast. The swell builds to 5ft over the weekend, but the period is a short 7 seconds. This is where it gets tricky. The wind is either cross or cross-off, and while it might be clean, the short period means the waves will be crumbly, soft, and lack any real punch. It's the kind of surf that looks fun from the beach but turns to mush on the sandbar.
Monday
Short Range ForecastHeavy rain (total 61mm), heaviest during Thu night. Warm (max 29°C on Tue afternoon, min 19°C on Thu morning). Winds decreasing (fresh winds from the SW on Wed morning, light winds from the N by Fri morning). | Days 5-7 Weather SummarySome drizzle, heaviest during Sun night. Warm (max 27°C on Mon morning, min 20°C on Fri afternoon). Wind will be generally light. | |||||||||||||||||||
Tue 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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) | S 9 | S 8 | SSW 8 | SSW 9 | S 9 | S 8 | S 8 | ENE 8 | E 14 | E 14 | E 14 | E 14 | ESE 13 | ESE 13 | E 13 | E 13 | E 12 | SE 9 | SE 9 | SE 9 |
Wave Graph | ||||||||||||||||||||
461 | 601 | 1051 | 841 | 549 | 241 | 196 | 240 | 144 | 140 | 183 | 180 | 299 | 295 | 272 | 273 | 239 | 258 | 255 | 243 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-on | on | cross-on | cross-on | cross-off |
High Tide | 4:00PM1.44m | 2:25AM1.38m | 4:17PM1.48m | 3:18AM1.48m | 4:35PM1.51m | 4:02AM1.57m | 4:53PM1.53m | 4:42AM1.62m | 5:12PM1.55m | 5:20AM1.63m | 5:30PM1.56m | 5:58AM1.59m | 5:50PM1.57m | |||||||
Low Tide | 9:23PM1.01m | 9:23AM0.31m | 9:48PM0.87m | 9:59AM0.30m | 10:15PM0.72m | 10:31AM0.32m | 10:42PM0.59m | 11:01AM0.38m | 11:11PM0.48m | 11:29AM0.47m | 11:41PM0.39m | 11:55AM0.58m | 00:13AM0.33m | |||||||
— | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | |
5:57 | — | — | 5:55 | — | — | 5:54 | — | — | 5:52 | — | — | 5:52 | — | — | 5:50 | — | — | 5:49 | — | |
mm | 1 | 9 | 3 | 4 | 9 | — | 2 | 26 | 7 | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 29 | 27 | 28 | 28 | 23 | 19 | 20 | 20 | 20 | 20 | 21 | 23 | 22 | 22 | 26 | 26 | 25 | 27 | 28 | 25 |
Feels °C | 31 | 28 | 27 | 29 | 26 | 17 | 19 | 19 | 22 | 21 | 23 | 25 | 23 | 24 | 29 | 30 | 29 | 30 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | S 9 | E 8 | E 10 | SE 10 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | SSW 8 | E 14 | ESE 13 | ESE 13 | E 13 | E 13 | E 12 | SE 9 | SE 9 | SE 9 |
461 | 35 | 49 | 26 | 549 | 241 | 196 | 105 | 80 | 76 | 58 | 180 | 299 | 295 | 272 | 273 | 239 | 258 | 255 | 243 | |
Swell 2 Height (m) Direction Period (s) | E 9 | SE 10 | E 17 | E 16 | ESE 11 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | S 7 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 8 | E 12 | E 12 | E 14 |
53 | 25 | 52 | 46 | 22 | 68 | 67 | 100 | 144 | 140 | 183 | 40 | 18 | 9 | 51 | 64 | 64 | 143 | 148 | 236 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | E 18 | ESE 12 | E 9 | E 16 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 9 | — | — | SSW 7 | SSW 7 | NE 7 | NE 7 | ENE 7 | SW 8 |
27 | 25 | 14 | 7 | 43 | 29 | 29 | 16 | 23 | 23 | 24 | 32 | — | — | 10 | 5 | 12 | 13 | 10 | 3 | |
Wind waves Height (m) Direction Period (s) | — | S 8 | SSW 8 | SSW 9 | NE 7 | NE 7 | NE 7 | ENE 8 | ENE 7 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 7 | — | — | — | — |
— | 601 | 1051 | 841 | 79 | 189 | 125 | 240 | 127 | 59 | 49 | 38 | 29 | 20 | 19 | 22 | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 30 | 534 | 561 | 595 | 177 | 184 | 90 | 22 | 0 | 0 | 0 | 0 | 35 | 0 | 0 | 35 | 30 | 30 | 30 | 0 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










