Surf Forecasts:
Fish Boma surf forecast from 18 Aug 2026:
- Best quality surf: Saturday 22 Aug, 8PM (local time) - 16ft (5.0m), 13s period, SW swell with cross-onshore winds.
- Most powerful swell: Saturday 22 Aug, 8PM (local time) - 16ft (5.0m), 13s period, SW swell with 8,562 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 5PM (local time) - 7.5ft (2.3m), 12s period with SW swell.
Best Forecast Surf Conditions for Fish Boma this week:
The surf forecast for Fish Boma over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 5PM. The primary swell is predicted to be 2.3m and 12s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Fish Boma in the next 16 days are 5.0m 13s and forecast to arrive on Saturday (Aug 22) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Friday (Aug 21) at 2PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Tue 18th Aug) | 7.5ft (2.3m) 12s |
| Best Surf | 8PM (Sat 22nd Aug) | 16ft (5.0m) 13s |
| Most Powerful | 8PM (Sat 22nd Aug) | 16ft (5.0m) 13s |
Table - best surf conditions forecast for Fish Boma over the next 16 days.
The Lowdown
Alright, Rusty here, and I've got a good look at what's comin' our way for Fish Boma. We got a solid run of surf stretching from this Tuesday, August 18th, all the way through to September 2nd, with only a few proper flat spots to worry about. There's no gap at the start, we've got waves on the very first day.
The water's colder than a witch's heart right now, sitting at 58°F, which is a whopping 5°F below what's normal for this time of year. That's seriously unusual, so grab the thickest wetsuit you've got if you're paddling out.
The action kicks off Tuesday morning, August 18th, with a 7ft SW swell, but the wind's coming from the west at 6 mph, making it a bit messy with that cross-on breeze. Energy is moderate, reading 1394. Not the cleanest start, but it's surfable. The real gem on Tuesday is the afternoon session. The swell bumps up to a nice 8ft from the SW with a solid 12-second period, and the wind dies to a glassy 3 mph from the SSE. That's the kind of calm that makes a reef break like Fish Boma really shine. The combined energy bumps up to 1702, so there's some real push behind it.
Wednesday the 19th is a write-off. The wind stays cross-on, and the swell gets a bit jumbled. Skip it.
Now, Thursday morning, August 20th, is where it gets interesting, and this might be our true standout. We've got a hefty 12ft swell from the SSW with a 13-second period. That's over 8ft, so this is expert territory only. But the wind is glassy out of the SW at just 3 mph. The wave energy is roaring at 4315, meaning there's a ton of power in the water. For an experienced surfer, that's a dream session at a reef break. The swell direction is a close match to the optimum.
Friday the 21st to Saturday the 22nd sees the size drop a bit, but then Saturday afternoon takes a turn for the angry. The wind hits 22 mph from the WSW, and the swell jacks to 13ft. That's not surfable; that's a washing machine. The energy hits 4229, but with that wind, it's just not worth it. For a beach setup, I'd say it's more interesting for kite surfing than paddling, but here at Fish Boma, it's just a mess.
Sunday the 23rd cleans up again by the afternoon with a 10ft SW swell and glassy south winds at 3 mph. That's another excellent session for the experts, energy at 2146.
The following week delivers a few more good windows. The spot to keep an eye on is Thursday, August 28th, in the morning. That's over a week out, so take it with a pinch of salt, but the data is promising. Swell is 5ft from the SW, but the period is a very long 18 seconds. That's groundswell royalty. It'll wrap perfectly into this reef. Winds are glassy out of the SSE. The energy is a solid 2256. For anyone who knows how a long-period swell behaves on a reef, this is a prime, clean session.
Then, on Wednesday morning, September 2nd, we've got another big pulse. 12ft from the SW at 15 seconds, with the wind dropping to a dead calm 0 mph. The energy is massive at 4533. Again, that's expert-only size, but with zero wind and that long period, the sets will be lined up and heavy. The afternoon is also a glassy 12ft with an even higher energy of 5395. This could be epic for the crew who can handle it.
Fish Boma can get a crowd sometimes, and on those clean, glassy days, especially with a long-period swell, you better believe there will be a few local guys out. But it's worth the paddle.
Rusty, signing off.
Short Range ForecastMostly dry. Very mild (max 16°C on Tue morning, min 12°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Fri afternoon, min 12°C on Sun night). Winds decreasing (strong winds from the WSW on Sat afternoon, calm by Sun night). | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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) | SW 13 | SW 12 | SW 13 | SW 12 | SW 12 | SW 12 | SSW 13 | SW 13 | SW 12 | SW 12 | SSW 12 | SW 11 | SW 10 | SW 11 | SSW 13 | SW 12 | SW 12 | SW 11 | SW 11 | SW 10 | SW 12 |
Wave Graph | |||||||||||||||||||||
1339 | 1670 | 2381 | 1860 | 1693 | 1476 | 4308 | 3314 | 1824 | 1250 | 614 | 702 | 1249 | 4216 | 7112 | 3244 | 2146 | 1257 | 915 | 848 | 1518 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-off | cross-on | cross-on | cross-off | glassy | cross-on | cross-off | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | glassy | glassy | on | cross-on | glassy |
High Tide | 6:58PM1.48m | 7:10AM1.26m | 7:31PM1.31m | 7:49AM1.12m | 8:20PM1.16m | 9:23AM1.00m | 10:47PM1.07m | 12:37PM1.04m | 00:51AM1.16m | 1:37PM1.19m | 1:41AM1.29m | 2:11PM1.34m | 2:15AM1.43m | ||||||||
Low Tide | 12:38PM0.38m | 1:11AM0.49m | 1:08PM0.53m | 1:49AM0.63m | 1:47PM0.68m | 2:58AM0.75m | 3:17PM0.82m | 6:04AM0.77m | 6:39PM0.79m | 7:27AM0.63m | 7:40PM0.65m | 8:02AM0.49m | 8:15PM0.51m | ||||||||
7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | |
— | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 14 | 16 | 16 | 14 | 15 | 16 | 13 | 17 | 18 | 15 | 17 | 18 | 15 | 15 | 15 | 12 | 16 | 16 | 12 |
Feels °C | 14 | 13 | 13 | 14 | 14 | 12 | 14 | 14 | 13 | 16 | 17 | 15 | 14 | 10 | 10 | 13 | 12 | 11 | 14 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 13 | SW 12 | SW 12 | SW 12 | SSW 13 | SW 13 | SW 12 | SW 12 | SSW 12 | SW 11 | E 5 | E 8 | SSW 13 | SW 12 | SW 12 | SW 11 | SW 11 | SW 10 | SW 12 |
1339 | 1670 | 2381 | 1860 | 1693 | 1476 | 4308 | 3314 | 1824 | 1250 | 614 | 702 | 2 | 13 | 7112 | 3244 | 2146 | 1257 | 915 | 848 | 1518 | |
Swell 2 Height (m) Direction Period (s) | E 11 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | SW 11 | ESE 5 | E 8 | — | — | — | — | — | WSW 12 | WSW 11 | — |
55 | 32 | 31 | 30 | 16 | 16 | 7 | 6 | 6 | 6 | 347 | 8 | 1 | — | — | — | — | — | 503 | 140 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | E 9 | E 8 | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | 6 | 1 | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SW 4 | — | — | — | — | — | — | W 3 | SW 10 | SW 11 | — | — | — | — | — | — | — |
— | — | — | — | 10 | — | — | — | — | — | — | 4 | 1249 | 4216 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 0 | 0 | 3 | 3 | 0 | 0 | 16 | 0 | 3 | 16 | 1 | 3 | 414 | 3 | 3 | 0 | 0 | 3 | 3 | 0 |
Best forecast wave conditions in Garden Route | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
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Information about the Fish Boma Surf forecast
The above surf forecast table for Fish Boma provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Fish Boma can be found by selecting the local surf guide option on the grey menu. Our Fish Boma 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 (Fish Boma) 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 Fish Boma 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 holiday in Garden Route? If you are looking for accommodation near Fish Boma, camping, hotels and holiday cottages in Garden Route, consider staying in Knysna which is 10 km (6 miles) away. Other places in and around Garden Route where you can find information about places to rent, and car hire include Plettenberg Bay which is 39 km (24 miles) away, George, Mossel Bay and Oudtshoorn.











