
Surf Forecasts:
Grunters surf forecast from 27 Jul 2026:
- Best quality surf: Saturday 1 Aug, 8AM (local time) - 16ft (5.0m), 15s period, SW swell with cross-onshore winds.
- Most powerful swell: Saturday 1 Aug, 11AM (local time) - 18ft (5.5m), 15s period, SW swell with 12,404 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 2AM (local time) - 11ft (3.5m), 14s period with SW swell.
Best Forecast Surf Conditions for Grunters this week:
The surf forecast for Grunters over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 28) at 2AM. The primary swell is predicted to be 3.5m and 14s period with a secondary swell of 0.1m and 24s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Grunters in the next 16 days are 5.5m 15s and forecast to arrive on Saturday (Aug 01) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 5s period and expected on Thursday (Jul 30) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 28th Jul) | 11ft (3.5m) 14s |
| Best Surf | 8AM (Sat 1st Aug) | 16ft (5.0m) 15s |
| Most Powerful | 11AM (Sat 1st Aug) | 18ft (5.5m) 15s |
Table - best surf conditions forecast for Grunters over the next 16 days.
The Lowdown
Alright, grab your board. This is Rusty, and I’m looking at the next couple of weeks for Grunters. This is a reef break, exposed to the swell, and it’s aiming for a WSW direction. The water temp is sitting at 66° right now, which is a touch warmer than normal for this time of year, so you might not need the thickest wetsuit.
The first real opportunity kicks off on Monday the 27th of July, but it’s not a pretty start. Monday morning is a write-off – 13ft of SW swell with a 12-second period, but it’s coming in with a cross-shore wind and a cross-chop. The combined energy is high (4045), but it’s messy. Monday afternoon drops to 12ft, still cross-shore, and still not clean. You’re better off waiting.
Tuesday the 28th of July is where it starts to get interesting. Tuesday morning, we’ve got 10ft of SW swell, a 14-second period, and an offshore breeze. The energy is solid (3929), and the conditions are clean. This is a good session for experienced surfers, but the swell is under 8ft, so it’s not a monster. The afternoon stays decent but gets a bit cross-shore again.
Then Wednesday the 29th of July morning is a standout. 8ft of SW swell, 13-second period, with a light offshore breeze. Clean as a whistle. The energy is still strong (3068). The afternoon drops to 7ft from the SSW, still clean, but the morning is the pick.
Thursday the 30th of July keeps it clean all day – 6ft of SW swell, 14-second period, and light offshore winds. This is a solid, consistent run of clean surf. The energy is still in the moderate range (1978-2116), but the quality is there.
Now, Friday the 31st of July takes a turn. The swell jumps to 12ft in the morning, with a 17-second period (very long period, groundswell), but it’s a fresh cross-shore wind that’s lumpy. The energy is up to 7437, but the wind is ruining it. The afternoon is a total loss with a cross-onshore wind and rain. Skip Friday.
Saturday the 1st of August brings a big pulse. 18ft of SW swell with a 15-second period. That’s proper big – over 8ft, so experts only. The combined energy is massive (12404). But the wind is cross-shore and creates a cross-chop. It’s not clean, but for the big-wave crew, it’s a rideable challenge. The afternoon is similar at 16ft.
Sunday the 2nd of August is a redemption day. The swell drops to 10ft from the WSW, but the wind goes offshore, and it’s clean. The morning has a moderate offshore breeze, but the afternoon is glassy with a slight air. 10ft, 13-second period, and clean. This is a top-tier session for experienced surfers.
Monday the 3rd of August is decent but smaller – 8ft, 14-second period, with a light cross-offshore breeze in the morning. Clean. The afternoon gets cross-shore and less appealing.
Tuesday the 4th of August is a true standout. The morning is glassy – 12ft of SW swell, 17-second period (very long period groundswell), and the wind is dead calm. The energy is huge (6729), and it’s glassy. This is exceptional surf for expert surfers. The afternoon has onshore wind, so the morning is the window.
After that, from Wednesday the 5th of August through to Sunday the 10th of August, it’s a rough stretch. The wind is strong, cross-shore, or onshore, and the conditions are poor or marginal. The swell stays big (12ft to 18ft), but it’s blown out. There’s a gap of about 6 days there where the quality is low.
Then Monday the 11th of August morning is a note: the swell is predicted to be 18ft with a 17-second period, but the combined energy is off the charts (17547). The wind is cross-shore, but the report says it’s too big for this break. This is a stormy, dangerous setup, not for the faint of heart. The afternoon is also big but with a slight cross-offshore wind.
So, the real standout for me is Tuesday the 4th of August morning – glassy, 12ft, long-period groundswell, and exceptional conditions. The second best is Sunday the 2nd of August afternoon – glassy, 10ft, and clean. The rest of the window is either too messy, too big, or just a waiting game.
This is Rusty, signing off.
Short Range ForecastMostly dry. Very mild (max 15°C on Tue afternoon, min 11°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Fri night. Very mild (max 18°C on Fri morning, min 9°C on Sat night). Winds increasing (light winds from the NE on Thu morning, fresh winds from the WSW by Fri night). | ||||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | |||||||||||||||
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 12 | SW 13 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 13 | SW 16 | SW 14 | SW 14 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | WSW 14 | SW 13 | SW 14 |
Wave Graph | |||||||||||||||||||||
4045 | 3675 | 4626 | 3705 | 3459 | 2880 | 2454 | 1317 | 1871 | 1336 | 1336 | 4090 | 7437 | 8042 | 11248 | 12404 | 11292 | 7073 | 3582 | 2959 | 2471 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross | off | cross-off | cross-off | off | cross-off | cross-off | cross | cross | cross-on | on | cross | cross | off | off | off | off |
High Tide | 8:16AM0.76m | 8:51AM0.77m | 9:22AM0.77m | 9:50AM0.75m | 10:14AM0.71m | 10:36AM0.65m | 1:41AM0.36m | 10:52AM0.58m | 1:28AM0.42m | ||||||||||||
Low Tide | 5:48PM0.06m | 6:11PM0.07m | 6:29PM0.10m | 6:38PM0.13m | 6:40PM0.17m | 6:37PM0.21m | 3:50AM0.36m | 6:33PM0.25m | |||||||||||||
7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | — | 7:11 | — | — | |
— | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 6 | — | — | — | — | — | — |
Temp °C | 14 | 14 | 13 | 14 | 15 | 13 | 13 | 15 | 14 | 15 | 17 | 16 | 18 | 18 | 16 | 13 | 13 | 12 | 11 | 14 | 13 |
Feels °C | 9 | 9 | 9 | 11 | 11 | 9 | 9 | 12 | 11 | 12 | 14 | 14 | 13 | 12 | 9 | 7 | 7 | 8 | 6 | 11 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 13 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 13 | SW 16 | SW 14 | SW 14 | SW 17 | SW 17 | SW 16 | — | SW 15 | SW 15 | SW 14 | WSW 14 | SW 13 | SW 14 |
4045 | 3675 | 4626 | 3705 | 3459 | 2880 | 2454 | 1317 | 1871 | 1336 | 1336 | 4090 | 7437 | 8042 | — | 12404 | 11292 | 7073 | 3582 | 2959 | 2471 | |
Swell 2 Height (m) Direction Period (s) | — | SW 17 | SW 24 | SW 21 | SW 19 | SW 18 | SW 18 | SW 16 | S 10 | SW 20 | SW 19 | SE 9 | — | — | — | — | — | SSW 13 | S 12 | S 11 | S 11 |
— | 405 | 22 | 224 | 940 | 1042 | 614 | 989 | 127 | 552 | 738 | 20 | — | — | — | — | — | 2718 | 1248 | 505 | 375 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | N 5 | S 10 | S 9 | — | — | — | — | — | — | — | — | — | SSW 14 |
— | — | — | — | — | — | — | — | 4 | 90 | 42 | — | — | — | — | — | — | — | — | — | 110 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | N 5 | — | — | WNW 6 | SW 16 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | 8 | — | — | 171 | 11248 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 35 | 35 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 29 | 242 | 354 | 527 | 35 | 16 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Grunters Surf forecast
The above surf forecast table for Grunters provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Grunters can be found by selecting the local surf guide option on the grey menu. Our Grunters 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 (Grunters) 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 Grunters 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.
Grunters is 95 km (59 miles) from the city of Bunbury. If you plan a holiday in Margaret River, look for hotels and other accommodation in Bunbury. Bunbury has rooms for a wide range of budgets as well as car hire and transport links.










