Surf Forecasts:
Guillotines surf forecast from 27 Jul 2026:
- Best quality surf: Thursday 30 Jul, 4AM (local time) - 6ft (1.8m), 8s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 10PM (local time) - 7ft (2.1m), 11s period, S swell with 974 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 1AM (local time) - 4ft (1.2m), 8s period with S swell.
Best Forecast Surf Conditions for Guillotines this week:
The surf forecast for Guillotines over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 30) at 1AM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.7m and 11s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Guillotines in the next 16 days are 2.1m 11s and forecast to arrive on Thursday (Jul 30) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Jul 29) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 30th Jul) | 4ft (1.2m) 8s |
| Best Surf | 4AM (Thu 30th Jul) | 6ft (1.8m) 8s |
| Most Powerful | 10PM (Thu 30th Jul) | 7ft (2.1m) 11s |
Table - best surf conditions forecast for Guillotines over the next 16 days.
The Lowdown
Alright, Rusty here again. Let's break this down for the Guillotines (Big Island).
First thing's first—there's a dry spell right out of the gate. No real surf worth paddling for until Thursday, July 30th. The water's around 64°F, which is pretty average for this time of year.
Thursday the 30th is your first real shot. The morning is glassy, and we're looking at a chest-high swell coming from the SSW, about 6ft. There's moderate energy (729) behind it. The afternoon turns out a solid 6ft S swell with a nice 11-second period—clean lines and a light breeze. This is the highlight of the first week.
Friday the 31st keeps things tidy with a glassy morning and 5ft of S swell. Saturday the 1st is small, just 4ft, but still glassy. Worth a session if you're jonesing.
Then we get a few days of trash until Tuesday, August 4th. That morning shows a clean 4ft S swell, but it's short period—only 7 seconds—so it's pretty weak.
Now, pay attention. The second week is where the magic happens. Wednesday, August 5th, brings a 7ft S swell with a moderate offshore wind and energy at 959. That's getting solid.
But the real monster is Friday, August 7th. Morning has a 8ft SE swell with a long 11-second period and a huge energy of 1271. This is for pros only. The afternoon goes off the charts: 8ft SE swell, same long period, and the energy jumps to 3064. Clean, powerful groundswell with a good offshore wind. This is the best day of the entire forecast.
Saturday the 8th holds at 10ft with glassy conditions in the morning and energy of 1890. Again, experts only. Sunday the 9th has a 6ft ESE swell in the morning, still glassy, but it gets ruined by onshore winds in the afternoon.
After that, it's all small and choppy junk. Guillotines are an inconsistent spot, so when it fires like this, you gotta be ready. Thursday the 30th is your warm-up, but Friday the 7th and Saturday the 8th are the days to circle. Big groundswell, clean, and powerful. Just remember—this is for experienced surfers only.
Rusty
Short Range ForecastMostly dry. Very mild (max 18°C on Tue morning, min 8°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 14°C on Sat morning, min 9°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
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) | SSE 8 | SSE 8 | S 8 | SE 15 | SE 14 | S 8 | SE 13 | SE 13 | S 8 | SSW 8 | S 11 | S 10 | S 10 | S 10 | SSE 9 | SSE 9 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | SE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 118 | 68 | 19 | 33 | 33 | 8 | 7 | 7 | 176 | 509 | 720 | 598 | 422 | 432 | 283 | 218 | 137 | 186 | 154 | 125 | 119 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross | cross-off | glassy | cross-on | cross-on | cross-on | cross | cross-on |
High Tide | 6:51PM1.44m | 7:41AM0.98m | 7:30PM1.49m | 8:18AM1.02m | 8:08PM1.52m | 8:54AM1.06m | 8:44PM1.52m | 9:29AM1.10m | 9:20PM1.50m | 10:05AM1.14m | 9:56PM1.45m | 10:42AM1.19m | 10:34PM1.38m | ||||||||
Low Tide | 12:15PM0.48m | 1:46AM0.24m | 12:59PM0.44m | 2:22AM0.20m | 1:40PM0.41m | 2:56AM0.17m | 2:19PM0.38m | 3:28AM0.16m | 2:59PM0.38m | 4:00AM0.15m | 3:41PM0.38m | 4:32AM0.16m | 4:25PM0.39m | ||||||||
 | |  | | |  | |  | | | | | | | | | | | | | | |
 | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — |
 | — | 5:10 | — | — | 5:12 | — | — | 5:12 | — | — | 5:13 | — | — | 5:14 | — | — | 5:15 | — | — | 5:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 13 | 18 | 18 | 15 | 16 | 16 | 10 | 13 | 13 | 12 | 13 | 13 | 12 | 14 | 14 | 12 | 20 | 20 | 14 |
Feels °C | 12 | 12 | 10 | 12 | 12 | 11 | 9 | 10 | 5 | 9 | 9 | 8 | 10 | 10 | 9 | 11 | 11 | 10 | 15 | 15 | 11 |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SSE 8 | S 8 | S 9 | S 8 | SE 14 | SE 13 | SE 13 | S 8 | S 8 | S 11 | S 10 | S 10 | S 10 | SSE 9 | SSE 9 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | SE 11 |
| kJ | 118 | 68 | 19 | 14 | 5 | 8 | 7 | 7 | 176 | 213 | 720 | 598 | 422 | 432 | 283 | 218 | 137 | 186 | 154 | 125 | 119 |
Swell 2 Height (m) Direction Period (s) | SE 14 | SE 15 | NE 4 | SE 15 | SE 14 | S 8 | S 8 | E 13 | S 11 | NE 7 | NE 6 | NE 6 | NE 7 | NE 7 | NE 7 | NE 7 | SSE 10 | NE 4 | NE 5 | NE 5 | NE 5 |
| kJ | 7 | 8 | 6 | 33 | 33 | 4 | 1 | 3 | 125 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 97 | 6 | 8 | 25 | 14 |
Swell 3 Height (m) Direction Period (s) | SE 18 | — | SE 7 | SSE 7 | SE 7 | SE 6 | NE 8 | E 8 | E 8 | S 15 | — | — | E 13 | E 13 | E 13 | E 12 | NE 8 | NE 8 | E 18 | SE 12 | E 16 |
| kJ | 12 | — | 8 | 4 | 2 | 1 | 3 | 1 | 1 | 5 | — | — | 3 | 3 | 3 | 3 | 2 | 2 | 6 | 53 | 5 |
Wind waves Height (m) Direction Period (s) | — | NE 3 | NNW 2 | NW 3 | NW 3 | NW 3 | W 4 | SW 4 | — | SSW 8 | — | — | — | — | — | — | — | — | NNE 5 | NNE 5 | — |
| kJ | — | 8 | 1 | 1 | 3 | 2 | 13 | 12 | — | 509 | — | — | — | — | — | — | — | — | 24 | 87 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 45 | 15 | 17 | 17 | 101 | 486 | 476 | 0 | 0 | 0 | 0 | 0 | 55 | 0 | 0 | 235 | 7 | 7 | 7 | 7 |
Best forecast wave conditions in South Coast - New South Wales | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Guillotines Surf forecast
The above surf forecast table for Guillotines provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Guillotines can be found by selecting the local surf guide option on the grey menu. Our Guillotines 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 (Guillotines) 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 Guillotines 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.
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