Surf Forecasts:
Octagon House surf forecast from 12 Aug 2026:
- Most powerful swell: Friday 14 Aug, 7PM (local time) - 3ft (0.9m), 6s period, SSE swell with 49 kJ wave energy.
Best Forecast Surf Conditions for Octagon House this week:
The most powerful waves expected at Octagon House in the next 16 days are 0.9m 6s and forecast to arrive on Friday (Aug 14) at 7PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Wednesday (Aug 19) at 10AM.
| Wave Type | Time (CDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Fri 14th Aug) | 3ft (0.9m) 6s |
Table - best surf conditions forecast for Octagon House over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s be straight with you—this stretch is looking pretty flat and messy for the next couple of weeks. The swell just isn’t there, and what little energy rolls through is coming in short-period and onshore, so don’t expect much to write home about. If you’re chasing waves, you might want to find something else to do for a while.
Water temp at Octagon House (Big Island) is sitting at 87°, which is a touch warmer than normal for this time of year—nothing crazy, but you’ll feel it.
The first few days—Wednesday the 12th through Friday the 14th—are plain poor. We’ve got 2ft to 3ft of SSE windswell with periods around 4 to 5 seconds, and the wind is cross-onshore, chopping things up. Combined energy is weak, only 18 to 44. Not worth paddling out for.
Monday the 17th and Tuesday the 18th stay small, 2ft or less, with a bit of glassy morning wind here and there, but the swell is just too anemic—periods of 5 to 6 seconds, energy down around 17 to 26. You’d be bobbing around more than surfing.
The following week, from Wednesday the 19th onward, it’s even smaller. We’re talking 1ft or less, mostly onshore and choppy, with energy dropping into single digits by Friday the 21st. There’s a brief stint around the 24th where it’s glassy but only 0.3ft—basically a lake.
One small glimmer: Thursday morning the 27th, we get a light offshore NW wind and a bit of cleanish surf, but it’s still only 2ft with a 4-second period and energy of 15. That’s not going to get anyone excited.
Bottom line: no good surf in this 16-day window. Octagon House is fairly consistent normally, so this flat spell feels unusual, but it happens. Forecasts can shift—keep an eye out, but don’t hold your breath.
Rusty out.
Short Range ForecastMostly dry. Warm (max 30°C on Wed morning, min 28°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 30°C on Sun morning, min 27°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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) | SSE 4 | SSE 4 | S 4 | SSE 5 | SSE 5 | SSE 5 | SSE 5 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SE 6 | SE 5 | SSE 4 | SSE 5 | SE 9 | S 3 |
Wave Graph  | |||||||||||||||||||||
 kJ | 15 | 15 | 22 | 35 | 36 | 46 | 44 | 39 | 47 | 39 | 29 | 32 | 28 | 32 | 22 | 15 | 13 | 13 | 13 | 13 | 8 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | on | cross-on | glassy | on | cross-on | glassy | on | cross-on | cross | cross-on | cross-on |
High Tide | 2:48PM0.39m | 6:35AM0.36m | 4:08PM0.37m | 6:53AM0.34m | 5:30PM0.34m | 7:10AM0.33m | 7:00PM0.32m | 7:23AM0.32m | 8:39PM0.31m | 7:31AM0.32m | 10:35PM0.33m | 7:24AM0.33m | 1:12AM0.36m | ||||||||
Low Tide | 10:20AM0.34m | 10:50PM-0.09m | 11:10AM0.29m | 11:36PM-0.02m | 12:05PM0.23m | 00:21AM0.06m | 1:00PM0.17m | 1:04AM0.15m | 1:54PM0.11m | 1:48AM0.23m | 2:46PM0.07m | 2:42AM0.30m | 3:39PM0.03m | ||||||||
 | |  | | | |  | | | | | | | | | | | | | | | |
 | 6:47 | — | — | 6:47 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — |
 | — | 8:02 | — | — | 8:01 | — | — | 8:00 | — | — | 8:00 | — | — | 7:59 | — | — | 7:58 | — | — | 7:57 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 30 | 30 | 28 | 30 | 29 | 29 | 30 | 30 | 29 | 29 | 29 | 28 | 30 | 30 | 28 | 30 | 30 | 28 | 30 | 30 | 28 |
Feels °C | 32 | 31 | 30 | 31 | 29 | 32 | 32 | 32 | 32 | 31 | 30 | 30 | 32 | 30 | 29 | 32 | 31 | 29 | 32 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 8 | SE 8 | SE 8 | SE 7 | — | SSE 5 | — | — | SSE 6 | SSE 6 | — | SSE 6 | SSE 6 | — | SE 6 | SE 11 | SE 10 | SSE 5 | SE 9 | SE 9 |
| kJ | 3 | 3 | 3 | 3 | 2 | — | 44 | — | — | 39 | 29 | — | 28 | 32 | — | 15 | 4 | 4 | 13 | 3 | 3 |
Swell 2 Height (m) Direction Period (s) | — | SE 8 | SE 8 | — | — | — | — | — | — | SW 4 | SSW 4 | — | — | — | — | S 9 | SE 10 | — | SSE 9 | SE 9 | ESE 5 |
| kJ | — | 3 | 3 | — | — | — | — | — | — | 5 | 2 | — | — | — | — | 2 | 4 | — | 8 | 13 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 10 | — | — | — | — | — | — | SSE 8 | — | — | — | — | — | — | — | — | — | S 6 | — |
| kJ | — | — | 4 | — | — | — | — | — | — | 6 | — | — | — | — | — | — | — | — | — | 1 | — |
Wind waves Height (m) Direction Period (s) | SSE 4 | SSE 4 | S 4 | SSE 5 | SSE 5 | SSE 5 | — | SSE 6 | SSE 6 | — | — | SSE 6 | — | — | SSE 6 | — | SE 5 | SSE 4 | — | SSE 5 | S 3 |
| kJ | 15 | 15 | 22 | 35 | 36 | 46 | — | 39 | 47 | — | — | 32 | — | — | 22 | — | 13 | 13 | — | 9 | 8 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1296 | 1395 | 1291 | 1296 | 1445 | 1291 | 1296 | 1412 | 1291 | 1296 | 1397 | 1291 | 1296 | 1395 | 1291 | 1296 | 1468 | 1291 | 1296 | 1395 | 1291 |
Best forecast wave conditions in Texas | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Octagon House Surf forecast
The above surf forecast table for Octagon House provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Octagon House can be found by selecting the local surf guide option on the grey menu. Our Octagon House 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 (Octagon House) 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 Octagon House 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.
Are you planning a vacation in Texas? If you are looking for accommodation near Octagon House, camping, hotels and condos and appartments in Texas, consider staying in Angleton which is 33 km (20 miles) away. Other places in and around Texas where you can find information about places to rent, and car hire include La Marque which is 33 km (20 miles) away, Lake Jackson, Texas City and Galveston.
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