Surf Forecasts:
Bali Bay (Glen Reef) surf forecast from 17 Aug 2026:
- Best quality surf: Thursday 20 Aug, 8AM (local time) - 11ft (3.5m), 13s period, SW swell with cross-shore winds.
- Most powerful swell: Thursday 20 Aug, 8AM (local time) - 11ft (3.5m), 13s period, SW swell with 3,997 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 8AM (local time) - 11ft (3.5m), 13s 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 Thursday (Aug 20) at 8AM. The primary swell is predicted to be 3.5m and 13s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Bali Bay (Glen Reef) in the next 16 days are 3.5m 13s and forecast to arrive on Thursday (Aug 20) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Tuesday (Aug 25) at 2AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 20th Aug) | 11ft (3.5m) 13s |
| Best Surf | 8AM (Thu 20th Aug) | 11ft (3.5m) 13s |
| Most Powerful | 8AM (Thu 20th Aug) | 11ft (3.5m) 13s |
Table - best surf conditions forecast for Bali Bay (Glen Reef) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get into the surf for the next couple weeks.
The next fortnight is a bit of a mixed bag, so let's break it down. We've got a few windows of solid swell, but the wind is going to be the main factor in whether it's worth getting wet.
Starting this Tuesday the 18th, it's all a bit quiet. There's a 6.6ft WSW swell with a 12-second interval, but a SSE breeze is putting some chop on it, so it's not going to be clean. The wave energy is moderate at best. We see a jump in size to 9.8ft on Tuesday afternoon, but the wind picks up a bit, making it messier.
Wednesday the 19th is more of the same. Still a lumpy 8.2ft SW swell (1866) with a cross-onshore wind. Looks like a couple of days to sit on the beach, not much in the way of decent surf.
Now, here's where it gets interesting. Thursday the 20th morning. The swell jumps to a solid 11.5ft from the SW with a 13-second period. The wind is a gentle cross-shore from the SSE, which is workable. The energy is strong (3844). However, this one is flagged as too big for this break. It's going to be a heavy, powerful wall of water, so unless you're a top-tier surfer, this is one to skip. It'll be a sight to see though.
After that, the surf backs down. Friday the 21st has a smaller 6.9ft SW swell, but the cross-onshore wind kills it. Saturday the 22nd starts small and weak, but the afternoon sees a jump back to 9.8ft with a more favorable cross-offshore wind from the NNW, making for cleaner conditions. Might be worth a look late in the day.
Sunday the 23rd has a clean 8.2ft SW swell in the morning with light cross winds, but it's not a standout. Monday the 24th is smaller and weaker, not worth the effort.
Now, don't sleep on Tuesday the 25th. The swell gets a nice bump in period to 14 seconds, coming from the SW at 7.5ft in the morning. With a clean, moderate cross-offshore breeze from the SE, this is looking like proper groundswell that will have some push and shape. This is one of the better windows in the forecast.
The rest of the week is a bit patchy. Wednesday the 26th and Thursday the 27th see the swell drop in size and energy. Not terrible, but nothing to get excited about.
Here's the one to circle on the calendar: Friday the 28th of August. The long-range models are showing a significant pulse. We're talking a massive 13.1ft WSW swell with a very long 16-second period. The energy readings are off the charts (7724). This is a huge groundswell. However, the message is the same as the 20th – it's predicted to be too big for Bali Bay. The swell direction is good, but the sheer size and power will make it a dangerous, closed-out mess unless you know the spot perfectly. It's promising, but you have to be an expert.
Saturday the 29th gets blown out by a strong 25 mph SE cross-offshore wind. It'll be clean but howling, with a 9.8ft SW swell keeping the energy high.
Then we finally get the standout. Sunday the 30th of August. The wind drops right out, with a light SE cross-offshore breeze in the morning. We've still got that solid 9.8ft SW groundswell with a 14-second period. The energy is strong (3159). This is the best combination of size, period, and wind we've seen in the whole window. This is a proper day for experienced surfers. The lineup at Bali Bay (Glen Reef) will be firing. This is the one.
The last few days of the window fade out. Monday the 31st is a mix of moderate winds and an 8.2ft swell, but nothing special. Tuesday the 1st and Wednesday the 2nd of September drop off in size. The very last day, Wednesday the 2nd, shows a small 4.9ft WSW swell, but the wind goes completely glassy. It's the smallest day, but it could be the cleanest if you just want some fun little waves.
So there you have it. There's a few days to dodge, but keep your eyes on Thursday the 20th if you're after a challenge, and definitely don't miss Sunday the 30th – that's the pick of the bunch. Friday the 28th is a big one, but you'd better be on your A-game.
Stay stoked.
Short Range ForecastSome drizzle, heaviest during Mon night. Very mild (max 15°C on Mon night, min 12°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 15°C on Fri afternoon, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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) | WSW 13 | WSW 12 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 12 | SW 12 | SW 11 | WSW 11 | WSW 11 | SSW 11 | SW 11 | SW 13 | SW 12 | WSW 13 | WSW 12 |
Wave Graph | |||||||||||||||||||
1648 | 1216 | 2596 | 2495 | 1866 | 1638 | 1848 | 3844 | 2589 | 1735 | 1126 | 466 | 359 | 323 | 2174 | 3185 | 2034 | 1338 | 780 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | cross-on | cross | cross | cross | cross-off | cross-on | cross-on | cross | cross-off | cross | cross | cross | cross | cross |
High Tide | 6:39AM1.44m | 6:59PM1.51m | 7:19AM1.32m | 7:41PM1.38m | 8:14AM1.22m | 8:42PM1.27m | 9:53AM1.16m | 10:27PM1.21m | 11:59AM1.20m | 00:10AM1.25m | 1:03PM1.31m | 1:08AM1.34m | |||||||
Low Tide | 00:36AM0.54m | 12:35PM0.59m | 1:15AM0.65m | 1:14PM0.71m | 2:05AM0.76m | 2:09PM0.83m | 3:29AM0.83m | 3:59PM0.91m | 5:24AM0.82m | 6:03PM0.88m | 6:38AM0.74m | 7:07PM0.78m | |||||||
— | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:16 | — | — | |
6:16 | — | 6:17 | — | — | 6:19 | — | — | 6:19 | — | — | 6:20 | — | — | 6:21 | — | — | 6:21 | — | |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 15 | 13 | 14 | 15 | 14 | 13 | 14 | 12 | 14 | 15 | 13 | 13 | 15 | 15 | 14 | 14 | 13 |
Feels °C | 15 | 13 | 11 | 9 | 11 | 12 | 12 | 11 | 10 | 8 | 12 | 13 | 12 | 9 | 12 | 15 | 12 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 12 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 12 | SW 12 | SW 11 | WSW 11 | SSW 11 | WSW 7 | SW 11 | SW 13 | SW 12 | WSW 13 | WSW 12 |
1648 | 1216 | 2596 | 2495 | 1866 | 1638 | 1848 | 3844 | 2589 | 1735 | 1126 | 466 | 340 | 147 | 2174 | 3185 | 2034 | 1338 | 780 | |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 12 | — | — | — | — | — | — | — | — | — | — | WSW 11 | SSW 11 | — | — | SSW 10 | SSW 10 | SSW 10 |
224 | 678 | — | — | — | — | — | — | — | — | — | — | 359 | 323 | — | — | 500 | 424 | 407 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 11 | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | 99 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SE 4 | SE 5 | SSW 11 | — | N 4 | NNW 4 | — | — | — | SE 3 |
— | — | — | — | — | — | — | — | — | 46 | 53 | 452 | — | 13 | 16 | — | — | — | 5 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 4 | 34 | 4 | 4 | 4 | 4 | 4 | 21 | 4 | 4 | 19 | 11 | 30 | 11 | 4 | 4 | 9 | 4 |
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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.











