Blacks Reef Surf Break

Lat Long: 39.07° S 177.80° E

Blacks Reef Surf Forecast and Surf Report

Issued: 5 pm 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Blacks Reef sea temperature is
11.8°C
1.9° 

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 23 Aug 2026:

  • Best quality surf: Monday 24 Aug, 3PM (local time) - 5.5ft (1.7m), 14s period, S swell with cross-offshore winds.
  • Most powerful swell: Thursday 27 Aug, 6PM (local time) - 7ft (2.2m), 17s period, S swell with 2,879 kJ wave energy.
  • Next surfable swell (1★+): Monday 24 Aug, 12PM (local time) - 4ft (1.2m), 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 1.2m and 8s period with a secondary swell of 0.3m and 17s. 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 2.2m 17s and forecast to arrive on Thursday (Aug 27) at 6PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 7s period and expected on Saturday (Aug 29) at 3AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Mon 24th Aug)4ft (1.2m) 8s
Best Surf 3PM (Mon 24th Aug)5.5ft (1.7m) 14s
Most Powerful 6PM (Thu 27th Aug)7ft (2.2m) 17s

Table - best surf conditions forecast for Blacks Reef over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let's have a look at what's on the cards for Blacks Reef. We've got a bit of a mixed bag coming our way, so let's break it down day by day.

The water is sitting at 53°F, which is a bit colder than we'd normally expect for this time of year. It's not a huge shock, but you'll want a decent wetsuit.

The start of the period is pretty quiet. We kick off Sunday the 23rd with a weak, short-period south swell pushing in. It's only 2ft with a combined energy of just 148, and that cross-offshore wind is making it messy. Not worth getting wet for. Monday morning the 24th sees a jump in size to 5ft, but the wind is straight cross-shore and the period is a short 9 seconds. The energy is picking up (362), but it's still only looking marginal.

Now, Monday afternoon the 24th is where things start to get interesting. The swell pushes up to 6ft from the south with a solid 14-second period. The combined energy jumps right up to 1370, which is solid moderate energy. That's a proper groundswell. The wind swings light offshore from the ENE, so the surface should be clean. This is the first real standout – this is for experienced surfers only at that size, but the quality is there for a good session.

Tuesday the 25th is a treat. The swell drops back a touch to 4ft, but the period is still a nice 12 seconds. The combined energy is a healthy 558. The wind is light and variable, going glassy in the afternoon. That is a recipe for clean, fun waves. Wednesday the 26th is smaller again, around 3ft to 3ft, but the period stretches out to a very long 17 seconds. The energy is moderate (around 490). That long period means the waves will be lined up and have plenty of push for their size. With glassy conditions in the morning and clean offshore winds in the afternoon, it’s a great day for a longboard or a fish.

Thursday the 27th is another cracker. The swell builds to 4ft in the morning and 6ft in the afternoon, all from the south with a super-long 17-second period. The combined energy hits 988 in the morning and a whopping 1919 in the afternoon – that's strong wave energy. This is the best on offer, no question. The wind is light and cross-offshore, keeping things clean. Again, the afternoon is for experienced surfers only. Friday the 28th holds some size at 5ft, but the wind picks up and the quality drops off into the marginal zone.

We hit a rough patch from Saturday the 29th right through to the end of the first week of September. The wind is all over the place, mostly onshore or strong cross-shore, and the swell quality takes a dive. There's a massive spike on Monday the 31st of August, with the swell predicted to be 12ft and energy at 3684, but the wind is cross-onshore and choppy. That's way too big for this spot and the conditions are blown out. It's more of a kitesurfing setup than a paddle session.

After that, we have a bit of a lull. Tuesday the 1st of September offers a bit of hope with a 3ft to 4ft south swell and a long 16-second period. The combined energy is solid (736 to 898), and we see some clean offshore wind in the afternoon. That's a promising window but it's a week and a half away, so don't bank on it just yet.

The rest of the first week of September is a write-off with strong winds and poor conditions. We finally see a return to clean, rideable waves on Sunday the 6th of September, with a small but clean 3ft to 3ft south groundswell and light winds. Monday the 7th is tiny again.

So, to sum it up: the standout sessions are Monday afternoon the 24th and all of Thursday the 27th for the experienced crew, with Tuesday the 25th and Wednesday the 26th being the pick for the rest of us. The long-range window around Tuesday the 1st of September is worth keeping an eye on, but it's a long way out.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Sun afternoon, min 8°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 18°C on Thu morning, min 12°C on Thu night). Wind will be generally light.

Sun
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
4
3
2
2
2
2
2
2
4
3
4
3
2
1
2
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SE
13
0.4
SE
13
1.4
SSW
9
1.7
S
14
1.7
S
13
1.2
S
12
1.1
S
12
0.7
S
15
0.7
S
17
0.9
S
16
0.8
S
16
1.5
S
17
2.1
S
18
2
S
16
1.7
S
14
1.5
S
13
1.2
S
12
0.9
S
12
0.9
S
11
0.8
S
11
Wave Graph
Metric surfscale
Energy kJ
50
44
281
1162
928
432
341
215
293
412
310
1342
2654
2063
1127
769
423
224
198
143
Wind (km/h)
30
NW
20
W
10
W
10
ENE
10
NW
10
NW
5
NE
10
NW
5
WNW
10
NE
10
NW
5
NW
15
ENE
15
N
15
N
20
N
25
NNW
15
NW
10
WSW
10
N
Wind State
cross-off
cross
cross
cross-off
cross-off
cross-off
glassy
cross-off
cross-off
cross-off
cross-off
glassy
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-on
off
High Tide
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
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
part cloud
cloud
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:41
6:41
6:39
6:37
6:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:38
5:38
5:39
5:40
5:42
5:43
 mm
Temp °C
17
12
13
14
12
15
17
13
17
17
15
18
16
14
16
16
16
17
17
10
Feels °C
11
6
11
10
9
13
15
10
15
14
13
16
12
12
12
12
12
14
14
9
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  • 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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