
Surf Forecasts:
Blacks Reef surf forecast from 9 Sep 2026:
- Best quality surf: Sunday 13 Sep, 12AM (local time) - 8ft (2.5m), 15s period, S swell with offshore winds.
- Most powerful swell: Sunday 13 Sep, 3AM (local time) - 10ft (3.0m), 16s period, S swell with 3,760 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 9PM (local time) - 4ft (1.2m), 8s period with SE 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 Wednesday (Sep 09) at 9PM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.4m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Blacks Reef in the next 16 days are 3.0m 16s and forecast to arrive on Sunday (Sep 13) at 3AM. 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 Monday (Sep 14) at 9PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 9th Sep) | 4ft (1.2m) 8s |
| Best Surf | 12AM (Sun 13th Sep) | 8ft (2.5m) 15s |
| Most Powerful | 3AM (Sun 13th Sep) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Blacks Reef over the next 16 days.
The Lowdown
Alright, Rusty here with the lowdown on Blacks Reef for the next couple weeks. Let's keep it real.
The first few days are a total flat spell. Don't bother getting the wetsuit wet until Wednesday the 9th.
Wednesday the 9th: Finally something to surf. The morning is glassy with a light westerly breeze, water temp is about 55°F, which is a hair cooler than normal for now. We're looking at 5ft swell from the SE, short period at 8 seconds, and the energy is okay at 344. It's clean and rideable. The afternoon gets a bit of a cross-offshore breeze, so it's still okay but not as perfect.
Thursday the 10th: Nope. Swell drops to under 3ft and the wind gets cross-shore in the morning, then onshore in the afternoon. Hard pass.
Friday the 11th: The morning has a 5ft S swell, but the wind is straight onshore and the period is a weak 6 seconds. The energy is there (479), but it's a choppy mess. The afternoon is tiny with a weird long period swell, only 2ft. Not worth it.
Saturday the 12th: Onshore all day. The afternoon has some deep energy (1021) with a 5ft swell and a 16-second period, but it's blown out. You'd be wasting your time.
Sunday the 13th: A big, powerful day but tricky. Morning has 8ft from the S with a 15-second period, packing a huge 2842 in energy. The wind is cross-shore, so it's not clean. This is strictly for experts. Afternoon is still 7ft but straight onshore.
Here’s the window you want. Monday the 14th: Morning starts clean with a light offshore breeze from the north. Swell is a solid 5ft from the S with a 12-second period and solid energy (819). Afternoon is just as good, with a light cross-offshore breeze and 5ft of swell. This is clean, powerful, and the direction is perfect. This is your best day in the first week.
Tuesday the 15th is also clean, with the swell easing to around 3-4ft. Fun for the smaller boards.
Then we get another flat spell from Wednesday the 16th through the weekend. Barely a ripple.
Look ahead to Saturday the 19th: The morning shows a 5-6ft S swell with a 15-second period and strong energy (1395). The wind is clean and offshore, but blowing a solid 30 km/h. That's a lot, but it is offshore. The afternoon settles down with a lighter offshore breeze and a 4ft swell. Decent for the experienced.
Monday the 22nd and Tuesday is mostly onshore and ugly.
But hold on for Wednesday the 23rd. The morning is *glass*. No wind. 4ft of swell from the S with an incredibly long 19-second period. The energy is massive (1529). This is a pure, long-period groundswell. It’ll be long, clean, and lining up perfectly on the reef. This is the one to dream on for the second week. The afternoon jumps to 10ft but with onshore wind, so that’s a whole different beast for experts only.
To wrap it up: Monday the 14th is your go-to for the first week. Clean, fun size, good shape. For the second week, keep your fingers crossed for the morning of Wednesday the 23rd – it’s a long way out, but the potential for a legendary, glassy session is real.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu night. Very mild (max 15°C on Thu morning, min 9°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sat morning. Very mild (max 16°C on Mon afternoon, min 8°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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) | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSW 16 | S 6 | S 18 | S 18 | S 17 | S 16 | S 15 | S 15 | S 14 | S 13 | S 12 | S 12 | S 12 | S 12 | S 11 | S 10 |
Wave Graph | |||||||||||||||||||||
284 | 196 | 128 | 79 | 55 | 80 | 206 | 238 | 156 | 215 | 1017 | 3000 | 2842 | 1735 | 1028 | 726 | 692 | 480 | 327 | 231 | 127 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | cross | on | on | on | cross | cross | on | on | off | cross | on | glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 3:41PM1.74m | 4:12AM1.62m | 4:37PM1.75m | 5:08AM1.63m | 5:33PM1.75m | 6:03AM1.67m | 6:25PM1.75m | 6:56AM1.71m | 7:15PM1.74m | 7:45AM1.75m | 8:04PM1.73m | 8:30AM1.77m | 8:52PM1.71m | ||||||||
Low Tide | 9:27AM0.13m | 10:02PM0.13m | 10:25AM0.11m | 10:59PM0.13m | 11:19AM0.11m | 11:53PM0.14m | 12:11PM0.13m | 00:45AM0.17m | 1:02PM0.18m | 1:33AM0.22m | 1:52PM0.24m | 2:19AM0.27m | 2:43PM0.29m | ||||||||
6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — | |
— | 5:52 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | |
mm | — | — | — | — | — | 4 | 3 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 10 | 15 | 15 | 12 | 10 | 12 | 10 | 12 | 12 | 10 | 14 | 13 | 10 | 15 | 16 | 14 | 17 | 19 | 13 |
Feels °C | 10 | 8 | 6 | 12 | 13 | 10 | 7 | 10 | 7 | 8 | 9 | 7 | 10 | 8 | 8 | 12 | 13 | 11 | 15 | 16 | 9 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 7 | SE 7 | S 7 | S 7 | SSW 6 | S 16 | S 15 | S 15 | S 14 | S 13 | S 12 | S 12 | S 12 | S 12 | S 11 | S 10 |
284 | 196 | 128 | 79 | 55 | 44 | 33 | 103 | 51 | 60 | 1017 | 3000 | 2842 | 1735 | 1028 | 726 | 692 | 480 | 327 | 231 | 127 | |
Swell 2 Height (m) Direction Period (s) | S 9 | S 8 | S 8 | S 8 | S 8 | SSW 16 | S 19 | SE 7 | S 18 | S 17 | ENE 13 | ENE 12 | ENE 8 | ENE 8 | ENE 12 | S 17 | E 8 | NE 4 | S 16 | E 8 | SSW 13 |
56 | 36 | 34 | 22 | 21 | 80 | 184 | 62 | 156 | 215 | 33 | 30 | 7 | 7 | 14 | 87 | 5 | 10 | 21 | 6 | 60 | |
Swell 3 Height (m) Direction Period (s) | E 15 | E 15 | NE 4 | ENE 8 | NE 7 | NE 3 | SSW 13 | S 18 | ESE 7 | ENE 8 | ESE 7 | NE 12 | ENE 12 | ENE 12 | ENE 8 | E 8 | NE 12 | E 10 | E 9 | S 16 | E 12 |
4 | 4 | 3 | 6 | 8 | 1 | 56 | 238 | 18 | 14 | 4 | 25 | 14 | 14 | 7 | 6 | 6 | 7 | 6 | 21 | 12 | |
Wind waves Height (m) Direction Period (s) | — | — | NW 2 | NW 3 | — | — | S 6 | — | — | — | — | — | — | — | — | — | NE 2 | — | NNE 4 | NE 4 | NNE 4 |
— | — | 1 | 6 | — | — | 206 | — | — | — | — | — | — | — | — | — | 2 | — | 2 | 2 | 6 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 46 | 0 | 10 | 9 | 3 | 3 | 6 | 3 | 41 | 6 | 0 | 3 | 156 | 0 | 0 | 0 | 0 | 0 | 0 | 10 |
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.










