Surf Forecasts:
Big Ben surf forecast from 7 Aug 2026:
- Best quality surf: Thursday 13 Aug, 3PM (local time) - 10ft (3.0m), 11s period, E swell with cross-shore winds.
- Most powerful swell: Friday 14 Aug, 12AM (local time) - 11ft (3.5m), 11s period, E swell with 2,654 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 12AM (local time) - 6ft (1.9m), 14s period with ESE 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 09) at 12AM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 1.1m and 11s. 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 3.5m 11s and forecast to arrive on Friday (Aug 14) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Monday (Aug 10) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 9th Aug) | 6ft (1.9m) 14s |
| Best Surf | 3PM (Thu 13th Aug) | 10ft (3.0m) 11s |
| Most Powerful | 12AM (Fri 14th Aug) | 11ft (3.5m) 11s |
Table - best surf conditions forecast for Big Ben over the next 16 days.
The Lowdown
Alright, this is Rusty comin' at you from the beach. Let's break down what's happening at Big Ben for the next couple of weeks.
First off, this is a beach and jetty spot, good for beginners, but it's inconsistent. Water temp is 26°, which is a bit cooler than usual for this time of year.
The first few days are a bit of a wash. Friday the 7th and Saturday the 8th have some swell, like 1.4m to 2.0m, but the wind is cross-on or onshore and it's just choppy. The wave energy is moderate to strong (1590 and 1300), but it's not clean. Not worth paddling out for.
Sunday the 9th is a little better. 2.0m swell from the east with a 13-second period, which is a nice long groundswell. The wind is light cross-shore, so there's some shape. Energy is solid (1619), but it's still a bit messy. For a beginner spot, it's okay, but not amazing.
Now, Monday the 10th is where it gets interesting. Morning has a 2.3m east swell, 12-second period, and cross-offshore wind at 25 km/h. That's clean. Energy is strong (1693). This is the best we've seen. It's a bit big for total beginners, but for the average surfer, this is a solid session. The afternoon gets choppy, so hit it early.
Tuesday the 11th morning is also clean, with a 2.1m east swell and cross-offshore wind. Energy is strong (1411). Another good window. But the afternoon turns cross-shore and choppy.
Then we hit a lull. Wednesday the 12th and Thursday the 13th morning have swell, but the wind is onshore or cross, and energy drops. The 13th afternoon has a 3.0m swell, but it's flagged as too big for this break. Energy is very strong (3863), but the wave is too much for the jetty.
Friday the 14th and Saturday the 15th keep the size up around 2.5m to 3.0m, with clean cross-offshore winds. Energy is strong (2224 and 1859). These are for the experienced crew only. The 14th morning is especially clean.
The second week gets smaller. The 17th and 18th have waves around 1.2m to 1.6m, but the wind is cross-on or choppy, and energy is weak to moderate. Not great.
The real standout is Friday the 21st of August. The morning is glassy. No wind. The swell is 1.8m from the ENE with a 9-second period. Energy is moderate (594). The conditions are called "very good." For a beginner-friendly beach break, this is the cleanest, most user-friendly window in the whole forecast. The swell isn't too big, the wind is dead calm, and it's a Friday. Get on it.
The last day, Saturday the 22nd, has a 3.0m NE swell with an 11-second period, but it's flagged as too big. Energy is very strong (3164). That's for the experts.
So, if you're looking for the best bet, the morning of Friday the 21st is the pick. Clean, glassy, manageable size. The Monday and Tuesday before that are good for the more experienced, but the 21st is the one.
Rusty out.
Short Range ForecastLight rain (total 3mm), mostly falling on Fri morning. Warm (max 29°C on Fri morning, min 23°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 30mm), heaviest during Tue night. Warm (max 28°C on Mon morning, min 22°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | |||||||||||||||
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) | S 12 | S 12 | S 11 | SSW 11 | ESE 13 | ESE 14 | E 13 | E 13 | E 12 | E 12 | ENE 11 | ENE 11 | E 12 | ENE 11 | ENE 10 | SW 12 | E 9 | E 10 | E 11 | E 11 | E 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1170 | 887 | 617 | 513 | 633 | 1360 | 1421 | 1207 | 942 | 1480 | 1338 | 1536 | 1227 | 724 | 306 | 195 | 159 | 476 | 1376 | 2008 | 2654 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | glassy | cross | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | on | cross-on | cross | cross-off | cross | cross | cross-off |
High Tide | 9:44PM1.36m | 4:28PM1.26m | 11:10PM1.33m | 4:23PM1.35m | 00:59AM1.34m | 4:40PM1.42m | 2:16AM1.40m | 5:00PM1.47m | 3:13AM1.47m | 5:21PM1.50m | 4:00AM1.54m | 5:41PM1.52m | |||||||||
Low Tide | 6:50AM0.45m | 6:32PM1.25m | 8:04AM0.35m | 8:47PM1.21m | 8:59AM0.25m | 9:34PM1.12m | 9:42AM0.17m | 10:08PM1.02m | 10:20AM0.13m | 10:38PM0.92m | 10:54AM0.14m | 11:08PM0.81m | |||||||||
 | |  |  | | | |  |  | | | |  |  |  | | | | | | | |
 | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:54 | — | — | 4:54 | — | — | 4:56 | — | — | 4:56 | — | — |
 | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — |
mm | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | 21 | 7 | 1 | — | 3 | 5 | — |
Temp °C | 29 | 29 | 26 | 29 | 28 | 25 | 29 | 28 | 24 | 28 | 28 | 24 | 26 | 27 | 25 | 26 | 27 | 24 | 26 | 26 | 24 |
Feels °C | 32 | 31 | 30 | 32 | 30 | 29 | 30 | 29 | 26 | 26 | 26 | 25 | 26 | 27 | 26 | 27 | 28 | 27 | 27 | 28 | 25 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | S 11 | SSW 11 | ESE 13 | ESE 14 | E 13 | E 13 | E 12 | E 12 | SSW 11 | ENE 11 | E 12 | ENE 11 | ENE 10 | E 9 | E 9 | E 10 | E 11 | E 12 | E 11 |
| kJ | 1170 | 887 | 617 | 513 | 633 | 1360 | 1421 | 1207 | 942 | 1480 | 93 | 1046 | 1227 | 724 | 306 | 175 | 159 | 476 | 1148 | 1784 | 2654 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 9 | ESE 12 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SW 12 | SSW 11 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SSW 10 | SSW 10 |
| kJ | 378 | 370 | 293 | 330 | 363 | 297 | 198 | 136 | 116 | 97 | 112 | 118 | 118 | 92 | 92 | 195 | 87 | 126 | 117 | 71 | 67 |
Swell 3 Height (m) Direction Period (s) | ENE 15 | ENE 15 | ENE 14 | E 10 | E 10 | SW 13 | — | SW 12 | SSW 10 | SW 12 | SSE 11 | SSW 11 | SSW 11 | SE 13 | SSW 12 | SSW 5 | SSW 10 | S 4 | — | — | SSE 12 |
| kJ | 42 | 43 | 41 | 46 | 45 | 28 | — | 86 | 108 | 116 | 11 | 64 | 66 | 27 | 106 | 7 | 60 | 1 | — | — | 14 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | NNE 5 | ENE 11 | ENE 11 | — | SSW 11 | S 5 | E 4 | ENE 4 | — | E 11 | E 11 | — |
| kJ | — | — | — | — | — | — | — | — | — | 80 | 1338 | 1536 | — | 183 | 34 | 15 | 20 | — | 1376 | 2008 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 30 | 30 | 30 | 30 | 30 | 0 | 6 | 22 | 0 | 29 | 29 | 0 | 35 | 530 | 121 | 29 | 29 | 0 | 184 | 29 | 530 |
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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