Blacks Reef Surf Break

Lat Long: 39.07° S 177.80° E

Blacks Reef Surf Forecast and Surf Report

Issued: 11 pm 13 Aug 2026 (local time)

Forecast update in  hr  min

Today's Blacks Reef sea temperature is
12.2° C
1.6° 

Blacks Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Blacks Reef surf forecast from 13 Aug 2026:

  • Best quality surf: Saturday 15 Aug, 3AM (local time) - 7.5ft (2.3m), 9s period, E swell with cross-offshore winds.
  • Most powerful swell: Wednesday 19 Aug, 9PM (local time) - 11ft (3.5m), 15s period, S swell with 5,037 kJ wave energy.
  • Next surfable swell (1★+): Saturday 15 Aug, 3AM (local time) - 7.5ft (2.3m), 9s period with E 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 Saturday (Aug 15) at 3AM. The primary swell is predicted to be 2.3m and 9s period with a secondary swell of 0.2m and 15s. Another secondary swell of 0.1m and 13s is also forecast. 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 3.5m 15s and forecast to arrive on Wednesday (Aug 19) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 7s period and expected on Friday (Aug 14) at 6PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sat 15th Aug)7.5ft (2.3m) 9s
Best Surf 3AM (Sat 15th Aug)7.5ft (2.3m) 9s
Most Powerful 9PM (Wed 19th Aug)11ft (3.5m) 15s

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 coming our way.

Alright, so first up, the good news is there *is* surf on offer, but we’ve got a pretty sketchy first week to wade through. Thursday the 13th is a write-off, and honestly, the whole stretch from the 14th through to the 20th is mostly blown out or too messy to get excited about. There’s a lot of wind and rain in that mix. The water’s sitting at about 54°, which is a good couple of degrees colder than usual – that’s a notable chill for this time of year, so you’ll want the thick rubber.

The first real standout is Blacks Reef on Friday the 21st. After a week of rubbish, we finally get a clean-up. The morning session is the pick: glassy conditions with a light offshore from the NW, waves around 4 ft out of the south with a very long 16-second period. That’s proper groundswell energy with some serious grunt behind it. It’s a reef break, so that long period should wrap in nicely. This one’s rated for experienced surfers at that size, and with that clean glass, it’s going to be smooth. The afternoon holds too, with a clean 6 ft south swell and a cross-off breeze. Keep in mind, the crowds can be an issue here, so get in early.

After that, the weekend of the 22nd and 23rd drops off a bit. Saturday morning still has a clean 5 ft, but the energy is fading and the wind picks up. Sunday sees smaller waves, 3 ft to 3 ft, but still clean with a cross-off breeze. It’s not a standout, but it’s rideable.

There’s a bit of a lull through the middle of the next week, with only small, marginal stuff. Then another possible look-in on Monday the 24th afternoon with a 4 ft, 15-second south swell under clean conditions. Nothing massive, but it’s a fun option if you’re keen.

For the rest of the outlook into late August, it fades into small, weak surf. The 16-day window doesn’t have any other big standouts—just small, clean days for a longboard or a foiler, but nothing to write home about.

So to wrap it up: Friday the 21st of August is your day. That’s the one to circle. Glassy, solid south groundswell, clean lines. Get on it.

Rusty.

Short Range Forecast

Heavy rain (total 53mm), heaviest during Sat morning. Very mild (max 14°C on Fri morning, min 8°C on Sun morning). Winds increasing (light winds from the ENE on Fri night, strong winds from the SSW by Sat night).

Days 5-7 Weather Summary

Heavy rain (total 23mm), heaviest during Sun night. Very mild (max 11°C on Wed afternoon, min 8°C on Sun night). Mainly strong winds.

Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
2
2
2
1
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SE
8
0.5
SE
8
0.4
SE
8
2.3
E
8
2.2
E
9
2.1
E
8
2.2
ESE
9
3.5
SSW
8
4.5
S
10
4
S
10
4
S
9
3.5
S
10
4
S
10
3.5
S
10
3.5
S
9
3
SSW
9
4
S
10
3.5
S
11
2.5
S
10
Wave Graph
Metric surfscale
Energy kJ
36
28
20
686
735
630
705
1749
4096
3015
2713
2053
2920
2055
2106
1382
3822
3075
1431
Wind (km/h)
25
NE
20
NE
25
ENE
25
NE
15
ESE
15
ESE
15
SSW
50
SSW
40
SSW
35
S
35
SSW
30
SSW
40
SW
40
SSW
35
SSW
40
SW
40
SW
35
SSW
30
SW
Wind State
off
cross-off
cross-off
cross-off
cross
cross
on
on
on
on
on
on
on
on
on
cross-on
on
on
on
High Tide
6:24AM1.72m
6:49PM1.87m
7:19AM1.73m
7:41PM1.84m
8:11AM1.75m
8:31PM1.81m
9:00AM1.76m
9:21PM1.76m
9:46AM1.75m
10:10PM1.71m
10:33AM1.72m
10:59PM1.67m
Low Tide
00:16AM0.09m
12:32PM0.05m
1:11AM0.09m
1:24PM0.08m
2:02AM0.11m
2:17PM0.13m
2:51AM0.16m
3:09PM0.20m
3:39AM0.22m
4:01PM0.28m
4:27AM0.30m
4:51PM0.34m
light rain
light rain
mod rain
mod rain
mod rain
light rain
heavy rain
mod rain
light rain
light rain
light rain
light rain
light rain
rain showers
part cloud
part cloud
rain showers
rain showers
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:56
6:56
6:54
6:52
6:52
6:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:30
5:30
5:30
5:31
5:32
5:34
 mm
2
1
6
9
9
2
13
9
2
5
3
4
4
3
2
2
2
Temp °C
13
14
13
13
13
14
13
9
9
9
9
9
9
10
10
10
10
11
11
Feels °C
9
11
9
8
11
13
11
-1
0
0
1
2
0
1
2
2
2
5
5
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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