Sponge bay Surf Break

Lat Long: 38.70° S 178.06° E

Sponge bay Surf Forecast and Surf Report

Issued: 5 am 22 Aug 2026 (local time)

Forecast update in  hr  min

Today's Sponge bay sea temperature is
12.6° C
1.4° 

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


Sponge bay surf forecast from 22 Aug 2026:

  • Best quality surf: Monday 24 Aug, 6PM (local time) - 5ft (1.5m), 14s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Monday 24 Aug, 9PM (local time) - 5ft (1.5m), 14s period, SSE swell with 943 kJ wave energy.
  • Next surfable swell (1★+): Saturday 22 Aug, 3PM (local time) - 2.5ft (0.8m), 12s period with SSE swell.

Best Forecast Surf Conditions for Sponge bay this week:

The surf forecast for Sponge bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 22) at 3PM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 0.3m and 9s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Sponge bay in the next 16 days are 1.5m 14s and forecast to arrive on Monday (Aug 24) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Thursday (Aug 27) at 9PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Sat 22nd Aug)2.5ft (0.8m) 12s
Best Surf 6PM (Mon 24th Aug)5ft (1.5m) 14s
Most Powerful 9PM (Mon 24th Aug)5ft (1.5m) 14s

Table - best surf conditions forecast for Sponge bay over the next 16 days.


The Lowdown

Alright, let's get into it. Sponge Bay is a beach and reef setup that's fairly consistent, but for the next few days it's gonna be a mixed bag. We're looking at some smaller, ordinary surf to start, but there's a real standout window later in the first week that's worth getting excited about.

The water temp is about average for this time of year, so no need to dig out the booties or anything.

Let's break it down. From Saturday the 22nd to Tuesday the 26th, it's pretty underwhelming. We've got small swell, mostly under 3 feet, with periods around 9 to 13 seconds. The wind is mostly cross-offshore, which keeps things clean, but the wave energy is weak to moderate (between 58 and 322). The descriptions say "poor" or "surfable but very ordinary" – it's honestly not worth paddling out for unless you're desperate for a float.

Then we hit a sweet spot. Thursday morning the 27th is where it starts to get interesting. Swell picks up to 5 feet from the SSE, 14-second period, and the combined energy jumps to 801 – that's moderate energy but with real push. The wind is light and cross-offshore, keeping it clean. Thursday afternoon holds at 4 feet with similar conditions. This is looking like the best of the run.

Friday the 28th is another gem. Morning glass off with a 3-foot SSE swell, 16-second period, and 528 energy. That's a long-period groundswell; the waves will have plenty of shape and punch, but with that long period, it might break a little straight at the beach. Still, with glassy conditions, it's a no-brainer. Afternoon stays clean with 3 feet and a cross-off breeze.

The weekend of the 29th and 30th drops right back off – tiny, weak, and not worth your time.

Now, Monday the 31st throws a curveball. The morning shows 7 feet from the SSW, but only an 8-second period, so it's a windswell – peaky, maybe a bit messy. The wind is light and cross-off, so it'll be clean, but that size with short period at a beachie can be a handful. For the experienced crew, it might be fun, but beginners should sit this one out.

The first couple of days of September are a mixed bag again. Tuesday the 1st has a clean 4-foot morning but the afternoon turns cross-onshore and choppy. Wednesday the 2nd afternoon sees a massive 10-foot swell from the SSE, but the file is clear: it's too big for this break. That's expert-only territory, and even then, the power is immense.

After that, we get hit by a strong, cross-onshore pattern from the 3rd to the 4th, with 25 mph winds and messy conditions. Steer clear.

The outlook ends on a slightly better note – Saturday the 5th afternoon has a 7-foot SSW swell, but only a 10-second period, and Sunday the 6th morning has a clean 5-foot SSE swell with 12-second period and 591 energy. That's decent, but it's a long way out, so we'll see.

If you're picking one standout, Thursday the 27th through Friday the 28th is your window. Early morning sessions on those days, especially Friday with the glassy dawn patrol, are the cream of the crop. The SSE swell matches the optimum direction, the wind is kind, and the energy is there. Don't sleep on it.

Rusty

Short Range Forecast

Mostly dry. Very mild (max 16°C on Sat afternoon, min 8°C on Sat morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 20°C on Thu afternoon, min 11°C on Tue morning). Wind will be generally light.

Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
0
0
0
1
1
2
1
1
0
2
0
2
3
2
2
2
2
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SSE
12
0.8
SSE
12
0.7
SSE
11
0.6
SSE
11
0.4
SE
10
0.3
ESE
13
0.7
SSE
9
1.1
SSE
15
1.3
SSE
14
0.9
SSE
12
0.8
SSE
12
0.4
SSE
15
0.6
SSE
18
0.6
SSE
16
0.9
SSE
17
1.3
SSE
15
1.1
SSE
14
0.9
SSE
13
0.7
SSE
16
1
SSE
13
0.9
SSE
12
Wave Graph
Metric surfscale
Energy kJ
230
156
105
75
33
33
82
574
668
267
158
73
243
201
486
706
460
249
237
330
255
Wind (km/h)
15
NW
0
ENE
25
NW
25
NW
20
NW
15
WNW
10
NW
20
NE
15
NW
15
WNW
0
WNW
20
NW
15
NW
10
ESE
10
NW
10
NNW
10
ENE
15
NW
10
NNW
15
NE
20
NW
Wind State
cross-off
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
cross-off
cross-off
cross-on
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
High Tide
1:01PM1.78m
1:14AM1.71m
1:46PM1.73m
2:05AM1.65m
2:36PM1.70m
3:08AM1.63m
3:41PM1.69m
4:20AM1.65m
4:58PM1.73m
5:17AM1.71m
5:51PM1.81m
6:03AM1.79m
6:32PM1.89m
Low Tide
7:17PM0.77m
7:38AM0.75m
8:09PM0.81m
8:27AM0.80m
9:07PM0.83m
9:27AM0.82m
10:10PM0.83m
10:32AM0.78m
11:11PM0.79m
11:26AM0.72m
00:02AM0.73m
12:10PM0.65m
00:46AM0.66m
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:45
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>
5:36
5:37
5:37
5:38
5:39
5:40
5:40
 mm
Temp °C
15
16
12
14
15
12
13
13
12
16
18
14
16
15
14
17
20
16
18
19
14
Feels °C
13
14
7
8
11
7
10
8
8
13
16
10
13
12
11
15
17
14
15
15
9
  • Map Icons:
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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 Sponge bay Surf forecast

The above surf forecast table for Sponge bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sponge bay can be found by selecting the local surf guide option on the grey menu. Our Sponge bay 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 (Sponge bay) 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 Sponge bay 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.

Are you planning a holiday in Gisborne and Mahia? If you are looking for accommodation near Sponge bay, camping, hotels and holiday cottages in Gisborne and Mahia, consider staying in Gisborne which is 8 km (5 miles) away.

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