
Surf Forecasts:
Blacks Reef surf forecast from 11 Aug 2026:
- Best quality surf: Saturday 15 Aug, 3AM (local time) - 7ft (2.1m), 8s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 17 Aug, 3AM (local time) - 13ft (4.0m), 9s period, S swell with 2,485 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 9PM (local time) - 3ft (0.9m), 11s period with SSE 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 Tuesday (Aug 11) at 9PM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 1.0m and 8s. 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 4.0m 9s and forecast to arrive on Monday (Aug 17) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 8s period and expected on Friday (Aug 14) at 9PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 11th Aug) | 3ft (0.9m) 11s |
| Best Surf | 3AM (Sat 15th Aug) | 7ft (2.1m) 8s |
| Most Powerful | 3AM (Mon 17th Aug) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Blacks Reef over the next 16 days.
The Lowdown
Alright crew, Rusty here with a look at what’s coming our way for the next couple of weeks. We’ve only got one spot on the radar this time, but it’s going to dish up a proper mix of conditions.
This is a reef break, exposed to the south, so it sucks up any southerly energy that rolls in. It’s a very consistent wave, which is a good thing, but it can also get a bit crowded at times. The water temp is sitting at 54°, which is a bit colder than normal for this time of year, so you’ll want a decent wetsuit.
The first real chance to get wet kicks off on Wednesday, August 12th. The morning is looking alright with a 5ft swell from the SSE, but more importantly, we get a cross-offshore breeze from the NE at 9 mph. That’ll keep things clean. The swell energy is moderate at 274. It’s not a standout, but it’s a start.
Thursday, August 13th is where we see a bit of life. A 3ft SE swell with an offshore NNE breeze at 9 mph. Glassy, clean conditions. The energy is still moderate at 201. It’s a nice, small day for a beginner-friendly wave.
Now, if you’re looking for the best on offer in the near future, circle Saturday, August 15th on the calendar. The morning session is a winner: 7ft of east swell (period 8 seconds) with a cross-offshore ENE breeze. Wave energy is solid at 611. Expect clean, fun waves. The afternoon stays similar in size at 6ft, but a light cross-shore breeze may put a few ripples on the surface.
Things get a bit wild from Monday, August 17th through to Thursday, August 21st. That south swell really cranks up. Monday morning sees 10ft from the south, but it’s accompanied by strong onshore winds, making it a proper mess. This is expert-only territory and honestly, more interesting for the kite crew than paddle surfing.
The big stand-out, and the real highlight of the entire forecast, is Friday, August 21st. The morning is magic. We’ve got a 7ft south swell with a 13-second period (classic groundswell) and glassy conditions – offshore wind from the SSW at just 3 mph. The combined swell energy is a strong 1249. This is the one. The long period makes it better for this reef than a beach break, and with the wind off, it will be absolutely clean. It’s for experienced surfers at that size, but it’s the best wave we’re going to see.
Saturday, August 22nd morning also looks gorgeous. A 5ft south swell (11-second period) with glassy conditions from a light northerly. Energy is 714. A great follow-up session to Friday.
The final standout is Monday, August 24th afternoon: a 4ft SSE swell with a very long 14-second period and glassy conditions from the NNE. The energy is a solid 986. That long period will make for some proper, lined-up waves on the reef.
Tuesday, August 25th afternoon also gets a shout-out. A 5ft SSE swell with a 13-second period, glassy again. It’s for the experienced crew, but it’ll be clean.
After that, the winds get messy and the quality drops off. It’s been a good run, but it fades out.
Get on that Friday the 21st and Monday the 24th. That’s the gold.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Very mild (max 14°C on Thu afternoon, min 9°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 105mm), heaviest during Fri afternoon. Very mild (max 14°C on Fri afternoon, min 8°C on Sun morning). Winds increasing (light winds from the NE on Fri night, strong winds from the SW by Sun morning). | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 12 | SSW 8 | SSE 10 | SSE 8 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | E 6 | S 16 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | SSW 8 | S 9 | S 8 | S 8 |
Wave Graph | |||||||||||||||||||||
279 | 439 | 191 | 260 | 424 | 242 | 155 | 100 | 95 | 225 | 20 | 410 | 553 | 477 | 493 | 427 | 442 | 1449 | 1597 | 866 | 649 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-off | cross-off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | on | on | on | on | on | on |
High Tide | 3:57PM1.84m | 4:28AM1.70m | 4:56PM1.86m | 5:26AM1.71m | 5:54PM1.87m | 6:24AM1.72m | 6:49PM1.87m | 7:19AM1.73m | 7:41PM1.84m | 8:11AM1.75m | 8:31PM1.81m | 9:00AM1.76m | 9:21PM1.76m | ||||||||
Low Tide | 9:43AM0.16m | 10:20PM0.15m | 10:43AM0.10m | 11:18PM0.11m | 11:39AM0.06m | 00:16AM0.09m | 12:32PM0.05m | 1:11AM0.09m | 1:24PM0.08m | 2:02AM0.11m | 2:17PM0.13m | 2:51AM0.16m | 3:09PM0.20m | ||||||||
7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | |
— | 5:27 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | |
mm | — | — | — | — | — | — | — | — | 3 | 24 | 19 | 11 | 3 | 7 | 19 | 8 | 9 | 5 | 3 | 2 | 3 |
Temp °C | 11 | 11 | 11 | 11 | 12 | 11 | 12 | 14 | 13 | 13 | 14 | 13 | 13 | 13 | 13 | 9 | 8 | 9 | 8 | 9 | 9 |
Feels °C | 7 | 8 | 9 | 8 | 8 | 7 | 9 | 10 | 10 | 10 | 10 | 11 | 11 | 12 | 10 | -1 | -2 | 1 | -1 | 1 | 1 |
Swell 1 Height (m) Direction Period (s) | SSE 12 | S 8 | SSE 10 | SSE 8 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SSE 9 | SSE 10 | SE 13 | ESE 13 | E 8 | E 9 | E 9 | E 9 | ESE 8 | ESE 9 | ESE 9 | ESE 9 |
265 | 324 | 191 | 260 | 424 | 242 | 155 | 100 | 95 | 17 | 18 | 25 | 17 | 477 | 493 | 427 | 442 | 286 | 459 | 543 | 203 | |
Swell 2 Height (m) Direction Period (s) | NE 6 | SSE 11 | S 8 | SE 14 | S 11 | S 10 | S 10 | S 9 | ESE 14 | ESE 14 | ESE 14 | S 15 | S 16 | S 21 | SE 8 | S 17 | SSW 16 | NE 9 | SE 15 | SE 15 | SE 14 |
6 | 210 | 95 | 8 | 39 | 52 | 28 | 42 | 18 | 20 | 20 | 18 | 21 | 76 | 35 | 140 | 259 | 79 | 37 | 34 | 29 | |
Swell 3 Height (m) Direction Period (s) | S 16 | S 17 | NE 6 | S 18 | S 16 | ESE 13 | ESE 13 | ESE 13 | S 16 | S 16 | S 16 | SSW 15 | SSW 14 | ESE 13 | S 16 | — | — | ESE 15 | SE 15 | SE 14 | SE 13 |
21 | 53 | 2 | 6 | 5 | 17 | 18 | 17 | 21 | 21 | 20 | 22 | 20 | 17 | 137 | — | — | 22 | 36 | 33 | 45 | |
Wind waves Height (m) Direction Period (s) | S 8 | SSW 8 | — | NNE 6 | ENE 4 | NE 4 | NE 4 | NE 5 | NE 5 | E 6 | E 7 | E 8 | E 8 | ESE 7 | ESE 8 | SSE 8 | SSW 5 | SSW 8 | S 9 | S 8 | S 8 |
279 | 439 | — | 4 | 13 | 20 | 26 | 59 | 74 | 225 | 411 | 410 | 553 | 124 | 187 | 179 | 99 | 1449 | 1597 | 866 | 649 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 9 | 0 | 0 | 2 | 0 | 0 | 2 | 0 | 2 | 53 | 2 | 0 | 2 | 89 | 133 | 91 | 91 | 91 | 209 | 89 |
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.











