Surf Forecasts:
Blacks Reef surf forecast from 23 Aug 2026:
- Best quality surf: Monday 24 Aug, 3PM (local time) - 6ft (1.8m), 14s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 27 Aug, 6PM (local time) - 6.5ft (2.0m), 17s period, S swell with 2,375 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 12PM (local time) - 3.5ft (1.0m), 8s period with SSW swell.
Best Forecast Surf Conditions for Blacks Reef this week:
The surf forecast for Blacks Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 24) at 12PM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.7m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Blacks Reef in the next 16 days are 2.0m 17s and forecast to arrive on Thursday (Aug 27) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Aug 23) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Mon 24th Aug) | 3.5ft (1.0m) 8s |
| Best Surf | 3PM (Mon 24th Aug) | 6ft (1.8m) 14s |
| Most Powerful | 6PM (Thu 27th Aug) | 6.5ft (2.0m) 17s |
Table - best surf conditions forecast for Blacks Reef over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the menu for the local stretch.
We're looking at a solid run of waves coming up, but it's a bit of a slow start. The water is sitting at 53°, which is a touch colder than normal for this time of year, so you'll want that wetsuit.
The first few days are pretty quiet. Sunday the 23rd is a write-off – small, weak swell with a cross-off wind kicking up a chop. The combined energy is a measly 148 (weak). Not worth paddling out for.
Things start to get interesting on Monday the 24th. The morning is still a bit messy with a cross-shore wind, but the afternoon is where it's at. The swell jumps to 6ft from the S with a long 14-second period, and the energy hits a strong 1352. The wind swings light cross-off, making for clean conditions. This is a solid call for experienced surfers. The longer period will mean some nice shaped lines at Blacks Reef, but with that size, it's not for the beginners.
Tuesday the 25th is a bit of a mixed bag. The morning has a cross-shore wind messing things up a bit, but the afternoon turns glassy. The swell drops to 4ft from the S, 12-second period, with a moderate 456 energy. It's a fun, clean wave. A good smaller board day.
Wednesday the 26th is another beauty. The morning is glassy with a 3ft, 17-second period, long-period groundswell (500 energy). The afternoon stays clean with a cross-off breeze and a 3ft, 16-second period (530 energy). These long-period swells can get a bit straight at a beach break, but Blacks Reef is a reef setup, so it should handle it well.
Thursday the 27th morning has a cross-shore, but the afternoon fires up. The swell is 5ft from the S, 17-second period, with a whopping 1538 energy. The wind is light cross-off and the conditions are clean. That's another one for the experienced crew. Friday the 28th is similar but a bit smaller, with a 5ft, 15-second swell (1150 energy) in the morning, though the wind is a moderate breeze. It's still clean.
The weekend of the 30th and 31st is messy again. The 30th has strong winds and small, weak swell. The 31st brings a bigger, lumpy 8ft cross-on swell (741 energy) – poor conditions, not worth it.
Now, the real standout. Tuesday, September 1st, is the pick of the entire forecast. The morning is crystal clear. We've got an 8ft swell from the S, with a 14-second period. The energy is a massive 2665. The wind is a light cross-off from the NNW, making for clean, open faces. This is a big, powerful, clean swell. It's expert territory for sure, but for those with the skills, it's going to be incredible. That afternoon stays decent too, with a 7ft swell and light cross-shore wind.
There's a fun little run of cleaner, smaller waves from the 3rd to the 5th of September, but nothing that compares to that 1st. Then we get a massive spike on the 6th and 7th of September. There's an 18ft SSW swell coming in on the 6th with an insane 11206 energy, and offshore winds. That's a beast. It's simply too big for this break, so it's a no-go.
The real standout is Tuesday, September 1st at Blacks Reef. The 8ft S swell with light cross-off wind and a long period is a recipe for a proper session. Just be aware it's an exposed spot, and the crowds are often there, so get in early.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Tue afternoon, min 8°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Thu morning, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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) | S 10 | SE 13 | SE 13 | SSW 9 | S 14 | S 13 | S 12 | S 12 | SSW 11 | S 17 | S 16 | S 14 | S 17 | S 17 | S 16 | S 15 | S 14 | S 13 | S 12 | S 11 | S 10 |
Wave Graph | |||||||||||||||||||||
104 | 50 | 43 | 322 | 1335 | 1034 | 530 | 339 | 198 | 381 | 417 | 236 | 975 | 1907 | 1909 | 1074 | 704 | 377 | 278 | 202 | 138 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | glassy | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-off |
High Tide | 1:56PM1.54m | 2:10AM1.45m | 2:43PM1.52m | 2:58AM1.40m | 3:28PM1.49m | 3:46AM1.38m | 4:13PM1.49m | 4:33AM1.38m | 4:59PM1.50m | 5:22AM1.41m | 5:47PM1.53m | 6:11AM1.46m | 6:33PM1.57m | ||||||||
Low Tide | 8:10PM0.48m | 8:23AM0.46m | 8:57PM0.47m | 9:11AM0.44m | 9:43PM0.43m | 10:00AM0.41m | 10:29PM0.39m | 10:48AM0.36m | 11:15PM0.34m | 11:32AM0.32m | 00:03AM0.30m | 12:17PM0.28m | 00:49AM0.26m | ||||||||
6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | |
— | 5:37 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:43 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 12 | 14 | 14 | 12 | 15 | 17 | 13 | 16 | 16 | 16 | 18 | 17 | 15 | 16 | 16 | 15 | 15 | 13 | 11 |
Feels °C | 10 | 10 | 7 | 12 | 10 | 9 | 13 | 15 | 10 | 14 | 12 | 13 | 17 | 14 | 12 | 12 | 12 | 11 | 12 | 9 | 8 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | SE 13 | SSW 9 | S 14 | S 13 | S 12 | S 12 | SSW 11 | S 17 | S 16 | S 14 | S 17 | S 17 | S 16 | S 15 | S 14 | S 13 | S 12 | S 11 | S 10 |
104 | 50 | 43 | 322 | 1335 | 1034 | 530 | 339 | 198 | 381 | 417 | 236 | 975 | 1907 | 1909 | 1074 | 704 | 377 | 278 | 202 | 138 | |
Swell 2 Height (m) Direction Period (s) | SE 13 | NE 4 | SSE 9 | ESE 13 | ESE 13 | NE 4 | SE 13 | S 18 | S 15 | S 10 | S 9 | NE 4 | ESE 11 | ESE 11 | NE 4 | ESE 12 | SE 15 | NE 5 | NNE 5 | SE 12 | SE 14 |
44 | 5 | 17 | 34 | 35 | 2 | 26 | 55 | 163 | 90 | 39 | 2 | 13 | 12 | 4 | 14 | 8 | 12 | 5 | 25 | 53 | |
Swell 3 Height (m) Direction Period (s) | — | SE 13 | NE 5 | S 18 | — | SE 13 | NE 5 | SE 13 | ESE 12 | SE 13 | SE 13 | SE 12 | NE 10 | — | E 16 | SE 15 | NE 9 | ESE 14 | SE 13 | NE 10 | NE 5 |
— | 44 | 4 | 6 | — | 28 | 1 | 26 | 15 | 27 | 27 | 23 | 4 | — | 5 | 9 | 3 | 18 | 28 | 4 | 4 | |
Wind waves Height (m) Direction Period (s) | NNW 3 | NW 4 | SW 4 | NW 3 | — | NNE 4 | WNW 3 | — | — | — | — | — | — | — | NNE 4 | NE 3 | NE 4 | NW 3 | WNW 3 | ENE 4 | — |
5 | 14 | 16 | 1 | — | 9 | 2 | — | — | — | — | — | — | — | 13 | 5 | 8 | 1 | 1 | 2 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 33 | 33 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 3 | 10 | 109 | 0 |
Best forecast wave conditions in Gisborne and Mahia | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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Information about the Blacks Reef Surf forecast
The above surf forecast table for Blacks Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Blacks Reef can be found by selecting the local surf guide option on the grey menu. Our Blacks 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 (Blacks 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 Blacks 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.
Blacks Reef is 50 km (31 miles) from the city of Gisborne. If you plan a holiday in Gisborne and Mahia, look for hotels and other accommodation in Gisborne. Gisborne has rooms for a wide range of budgets as well as car hire and transport links.











