Surf Forecasts:
Bali Bay (Glen Reef) surf forecast from 20 Aug 2026:
- Best quality surf: Friday 21 Aug, 8AM (local time) - 7ft (2.1m), 11s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 2PM (local time) - 10ft (3.0m), 13s period, SW swell with 3,031 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 8AM (local time) - 7ft (2.1m), 11s period with SW swell.
Best Forecast Surf Conditions for Bali Bay (Glen Reef) this week:
The surf forecast for Bali Bay (Glen Reef) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 8AM. The primary swell is predicted to be 2.1m and 11s period with a secondary swell of 1.1m and 5s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Bali Bay (Glen Reef) in the next 16 days are 3.0m 13s and forecast to arrive on Thursday (Aug 20) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Tuesday (Aug 25) at 2AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Fri 21st Aug) | 7ft (2.1m) 11s |
| Best Surf | 8AM (Fri 21st Aug) | 7ft (2.1m) 11s |
| Most Powerful | 2PM (Thu 20th Aug) | 10ft (3.0m) 13s |
Table - best surf conditions forecast for Bali Bay (Glen Reef) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for Bali Bay (Glen Reef). This is a consistent reef setup that lights up with a solid swell from the right direction, but right now, it’s a bit of a mixed bag.
We’re starting off with a lot of energy in the water, but it’s not all good news. The surf is pumping, but it’s a case of too much of a good thing to begin with. The water’s also sitting at 57°, which is a couple of degrees cooler than what we’d normally expect for this time of year – a real nippy start.
Thursday the 20th is a write-off for most of us. We’ve got a big 12ft SW swell with a solid 13-second period, pumping a massive amount of energy into the reef (3587). That’s expert-only territory, and even then, the cross-shore wind is going to mess with the surface. The afternoon drops a touch to 10ft, but it’s still a big, messy affair.
Friday the 21st sees the swell back off to 7ft from the SW in the morning, and then 5ft in the afternoon. The period is still good at 11 seconds, but the wind is just cross, so it’s not going to be that clean. It’s a bit of a frustrating window.
The real standout in the first week turns out to be Tuesday the 25th. Early morning, there’s a clean 8ft SW groundswell (14-second period), pushing a heap of energy (2374). The wind is light and cross-offshore, which means the face will be clean. This is a proper session for experienced surfers, but the quality is there. The combined energy of all swells directed here is moderate at 1131.
We’ve got a few other moments to look at. Thursday the 27th morning is glassy with a small 4ft WSW swell – perfect for a longboard or a fun mid-length. Then, looking further out, Friday the 28th morning has a bigger 8ft WSW swell with a very long 15-second period. The wind is light and cross-offshore, setting up another excellent window for the experienced crew. The energy is strong (2717).
Now, the second week gets a bit wild. Tuesday the 1st of September throws a massive 12ft SW swell at us with a 15-second period, and the energy is just huge (4881). But the wind is cross, so it’s going to be a big, unruly mess. That’s a day for the jet skis or the kamikaze crew only. The next day, the 2nd, is completely blown out with strong winds.
The tail end of the forecast, on Friday the 4th of September, looks like a reward. A glassy morning with a tiny 4ft WSW swell – clean, calm, and all about the vibe. A perfect way to finish the 16-day run.
So, to sum it up: the best on offer is Tuesday the 25th for a clean, powerful session, and Friday the 28th for another big, clean swell. The rest of the time is full of promise but compromised by wind or size. Keep an eye on that 4th of September for a glassy, small-wave day.
Stay stoked, and keep your wetsuit zipped up tight.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Fri afternoon, min 12°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Tue afternoon, min 12°C on Sun morning). Winds decreasing (fresh winds from the SSE on Mon night, calm by Tue night). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 12 | SW 11 | SSW 11 | SSW 10 | SSW 12 | SW 11 | SW 12 | WSW 13 | WSW 13 | SW 12 | WSW 11 | WSW 11 | SW 15 | SW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 |
Wave Graph | |||||||||||||||||||||
3587 | 2577 | 1524 | 1131 | 485 | 411 | 458 | 629 | 1269 | 1748 | 1157 | 1299 | 859 | 376 | 1907 | 2027 | 1444 | 1061 | 598 | 485 | 374 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross | cross-on | cross-off | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross-off | cross | glassy | cross-off |
High Tide | 8:14AM1.22m | 8:42PM1.27m | 9:53AM1.16m | 10:27PM1.21m | 11:59AM1.20m | 00:10AM1.25m | 1:03PM1.31m | 1:08AM1.34m | 1:42PM1.42m | 1:47AM1.44m | 2:13PM1.53m | 2:20AM1.53m | 2:41PM1.63m | 2:51AM1.61m | |||||||
Low Tide | 2:09PM0.83m | 3:29AM0.83m | 3:59PM0.91m | 5:24AM0.82m | 6:03PM0.88m | 6:38AM0.74m | 7:07PM0.78m | 7:23AM0.64m | 7:47PM0.67m | 7:57AM0.54m | 8:19PM0.57m | 8:27AM0.46m | 8:48PM0.47m | ||||||||
7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | |
— | 6:19 | — | — | 6:20 | — | — | 6:21 | — | — | 6:21 | — | — | 6:22 | — | — | 6:22 | — | — | 6:23 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 13 | 14 | 17 | 15 | 15 | 15 | 15 | 14 | 15 | 13 | 14 | 15 | 14 | 16 | 22 | 21 | 26 | 27 | 20 |
Feels °C | 11 | 12 | 10 | 12 | 15 | 13 | 13 | 14 | 15 | 12 | 12 | 10 | 10 | 11 | 10 | 13 | 19 | 18 | 23 | 24 | 17 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 12 | SW 11 | SSW 11 | SSW 10 | SSW 12 | SW 11 | SW 12 | WSW 13 | WSW 13 | SW 12 | WSW 11 | WSW 11 | SW 15 | SW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 |
3587 | 2577 | 1524 | 1131 | 485 | 411 | 458 | 629 | 1269 | 1748 | 1157 | 1299 | 859 | 376 | 1907 | 2027 | 1444 | 1061 | 598 | 485 | 374 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | WSW 11 | WSW 11 | WSW 10 | WSW 17 | WSW 14 | SSW 11 | SSW 11 | — | — | SW 11 | W 11 | SSW 16 | SW 15 | SSW 13 | SSW 12 | SSW 11 | S 10 |
— | — | — | — | 435 | 291 | 198 | 27 | 459 | 443 | 325 | — | — | 220 | 157 | 232 | 441 | 238 | 426 | 359 | 98 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SSW 14 | — | — | WSW 11 | — | — | — | — | SW 15 | — | — | — | SSE 7 | SE 7 | W 21 | SW 11 |
— | — | — | — | — | 77 | — | — | 47 | — | — | — | — | 145 | — | — | — | 62 | 8 | 9 | 92 | |
Wind waves Height (m) Direction Period (s) | — | — | SE 4 | SE 5 | SE 5 | — | — | NNW 3 | — | — | — | — | SSE 4 | SSE 5 | SSE 6 | SSE 6 | SSE 6 | SE 7 | — | — | SSE 3 |
— | — | 24 | 71 | 49 | — | — | 2 | — | — | — | — | 24 | 54 | 145 | 115 | 117 | 164 | — | — | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 21 | 4 | 4 | 4 | 4 | 11 | 11 | 0 | 4 | 9 | 5 | 18 | 85 | 4 | 0 | 4 | 0 | 11 | 0 | 0 |
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Information about the Bali Bay (Glen Reef) Surf forecast
The above surf forecast table for Bali Bay (Glen Reef) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Bali Bay (Glen Reef) can be found by selecting the local surf guide option on the grey menu. Our Bali Bay (Glen Reef) 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 (Bali Bay (Glen Reef)) 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 Bali Bay (Glen Reef) 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.











