Sponge bay Surf Break

Lat Long: 38.70° S 178.06° E

Sponge bay Surf Forecast and Surf Report

Issued: 5 am 03 Aug 2026 (local time)

Forecast update in  hr  min

Today's Sponge bay sea temperature is
13.3° C
0.9° 

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 2 Aug 2026:

  • Best quality surf: Thursday 6 Aug, 9AM (local time) - 10ft (3.0m), 11s period, S swell with cross-shore winds.
  • Most powerful swell: Wednesday 5 Aug, 3AM (local time) - 16ft (5.0m), 11s period, S swell with 5,859 kJ wave energy.
  • Next surfable swell (1★+): Monday 3 Aug, 12PM (local time) - 3.5ft (1.1m), 10s period with SE 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 Monday (Aug 03) at 12PM. The primary swell is predicted to be 1.1m and 10s period with a secondary swell of 0.2m and 21s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Sponge bay in the next 16 days are 5.0m 11s and forecast to arrive on Wednesday (Aug 05) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Aug 08) at 9AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Mon 3rd Aug)3.5ft (1.1m) 10s
Best Surf 9AM (Thu 6th Aug)10ft (3.0m) 11s
Most Powerful 3AM (Wed 5th Aug)16ft (5.0m) 11s

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


The Lowdown

Alright, surfers, Rusty here. Let’s talk about what’s on the cards for Sponge Bay over the next couple of weeks. It’s a bit of a mixed bag, so let’s get straight into it.

The opening stretch is pretty grim. We’ve got a couple of days of messy, blown-out conditions starting Monday the 3rd. The swell is there, but the wind is just wrecking it. Tuesday the 4th and Wednesday the 5th are a write-off with strong cross-onshore winds and building swell. That Wednesday morning sees a big, powerful 15ft southerly swell with a strong breeze. It’s big and ugly. This isn't a time for paddling; it looks more like a day for the kites if anything.

After that rough patch, things start to settle. Thursday the 6th is still a bit messy with moderate cross-shore winds and junky waves. Friday the 7th is where it starts to get interesting. The morning is clean with a light cross-offshore breeze and a 4ft SE swell. But it’s the afternoon that has me a little more excited. The wind goes light and offshore, and the swell jumps to 5ft from the SSE with a very long 17-second period. That’s proper groundswell, bringing some real energy and shape. It’s an excellent window for more experienced surfers, especially on a setup like Sponge Bay (Sponge-Bay). The energy reading is moderate at 1432.

The weekend is more of a mixed story. Saturday the 8th is clean but a bit weaker, with a 4ft swell on the morning. Sunday the 9th has a lovely clean morning with lighter winds and a 4ft SE swell with a 16-second period. It’s a good, clean wave, but not as powerful. By Monday the 10th, the swell backs off significantly to a small and weak 2ft, and the wind goes onshore in the afternoon. We then slide into a few days of small, poor conditions with onshore winds and short-period leftovers.

We’ve got a bit of a lull from Monday the 10th through to Wednesday the 12th, but then things ramp up again. Thursday the 13th looks like the second standout. The morning brings a clean 8ft south swell with a light offshore wind. The period is a short 8 seconds, so it’s going to have some punch but might be a bit lumpy. It’s a solid size, but that short period means it’s going to be a handful, definitely one for the experienced crew as it’s over the 8ft mark in the morning. The energy is moderate to strong at 1232.

After that, it fades out into the following week. Friday the 14th has a clean 5ft morning wave, and Saturday the 15th starts off glassy with a 5ft SE swell. These are clean, small days. Sunday the 16th is also clean in the morning with a 4ft swell. Then, the final few days of the window look poor, with small waves and messy winds.

So, the best of it is pretty clear. The Friday afternoon session on the 7th with that long-period groundswell and glassy conditions is the pick of the first week. The wave size is a manageable 5ft, and that long period will make it feel more powerful. Get on it. Then, Thursday the 13th offers the most size and power for those who are up for a challenge. It’s a different beast, but for the experts, there’s plenty to sink your board into. Beyond that, it’s small and clean early, but nothing special.

Rusty out.

Short Range Forecast

Heavy rain (total 24mm), heaviest during Tue afternoon. Very mild (max 15°C on Mon afternoon, min 5°C on Tue night). Winds increasing (light winds from the W on Mon afternoon, strong winds from the SSW by Tue night).

Days 4-6 Weather Summary

Some drizzle, heaviest during Sat night. Very mild (max 14°C on Sat morning, min 5°C on Thu night). Wind will be generally light.

Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
2
0
0
0
0
0
0
!
1
2
2
3
2
1
1
1
1
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)
1.2
SSE
11
1
SSE
10
1
SSE
12
1.2
SSE
15
3.5
S
11
4.5
S
11
3.5
SSE
12
4
S
12
3
S
12
3
S
11
1.8
SSW
11
1.1
SE
10
1.3
SE
10
1.3
SSE
17
1.7
SSE
15
1.3
SSE
13
1.1
SE
12
0.9
SE
11
0.8
SE
11
0.6
SSE
16
0.6
SSE
14
Wave Graph
Metric surfscale
Energy kJ
305
220
283
573
2734
5230
3095
4445
2751
2157
787
255
315
848
1158
555
330
202
137
171
129
Wind (km/h)
20
NW
10
SSE
15
W
40
SSW
35
SW
45
SW
45
SSW
35
SW
30
SW
20
WSW
15
SSW
10
NW
10
NW
10
E
20
NW
15
NW
20
NNW
10
NW
10
WNW
20
S
15
SW
Wind State
cross-off
cross-on
cross-off
on
cross-on
cross-on
on
cross-on
cross-on
cross
cross-on
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
on
cross-on
High Tide
9:19AM1.89m
9:43PM1.98m
10:00AM1.91m
10:23PM1.98m
10:42AM1.92m
11:05PM1.95m
11:28AM1.91m
11:47PM1.92m
12:16PM1.90m
00:32AM1.88m
1:05PM1.89m
1:22AM1.83m
1:58PM1.86m
2:20AM1.79m
Low Tide
3:24PM0.54m
4:00AM0.54m
4:05PM0.52m
4:41AM0.50m
4:47PM0.51m
5:24AM0.47m
5:31PM0.52m
6:09AM0.46m
6:20PM0.54m
6:56AM0.45m
7:14PM0.57m
7:47AM0.47m
8:12PM0.60m
clear
clear
part cloud
light rain
rain showers
rain showers
light rain
rain showers
rain showers
part cloud
clear
clear
clear
cloud
part cloud
part cloud
cloud
rain showers
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:07
7:07
7:05
7:05
7:03
7:01
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:20
5:20
5:21
5:22
5:22
5:23
5:24
 mm
4
5
9
2
2
2
1
Temp °C
14
15
11
7
7
7
9
8
9
9
10
7
9
11
11
14
14
12
12
13
10
Feels °C
10
12
6
-2
-2
-4
-1
0
2
3
5
4
6
9
7
10
10
8
9
8
7
  • Map Icons:
  • Break
  • 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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