Ruby Bay Surf Break

Lat Long: 41.21° S 173.09° E

Ruby Bay Surf Forecast and Surf Report

Issued: 11 am 26 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ruby Bay sea temperature is
11.7°C
0.6° 

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


Ruby Bay surf forecast from 26 Aug 2026:

  • Best quality surf: Friday 28 Aug, 9PM (local time) - 4.5ft (1.3m), 9s period, N swell with offshore winds.
  • Most powerful swell: Friday 28 Aug, 12PM (local time) - 8ft (2.4m), 10s period, N swell with 1,043 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 9PM (local time) - 4.5ft (1.3m), 9s period with N swell.

Best Forecast Surf Conditions for Ruby Bay this week:

The surf forecast for Ruby Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 28) at 9PM. The primary swell is predicted to be 1.3m and 9s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Ruby Bay in the next 16 days are 2.4m 10s and forecast to arrive on Friday (Aug 28) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 10s period and expected on Friday (Aug 28) at 12PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Fri 28th Aug)4.5ft (1.3m) 9s
Best Surf 9PM (Fri 28th Aug)4.5ft (1.3m) 9s
Most Powerful12PM (Fri 28th Aug)8ft (2.4m) 10s

Table - best surf conditions forecast for Ruby Bay over the next 16 days.


The Lowdown

Alright, Rusty here. Let's get straight into it.

Look, I'm not gonna sugarcoat it – we've got a proper dry spell on our hands. The next 16 days are looking pretty grim for Ruby Bay, with no real surf to get excited about. It's one of those stretches where you're better off cleaning the wax off your board or getting the gear ready for a trip.

Ruby Bay is a point break that's a real fair-weather friend, and it's rarely breaking at the best of times. The water temperature at the moment is 53°, which is about 1° cooler than usual for this time of year, so nothing too out of the ordinary – just a standard winter chill, so you'll want the thickest wetsuit you've got.

We kick off on Wednesday the 26th of August with a couple of tiny, weak pulses. A 1 ft swell from the NW on Wednesday morning, dropping to a 3 ft from the NNW later, but periods are a short 4 to 6 seconds and the combined energy is a pitiful 5. It's glassy, sure, but it's basically a lake. The wave comment is "poor surf conditions" – enough said.

Thursday the 27th is a complete write-off with 0.3 ft surf. Friday the 28th gets a bit of a wind bump from the north, but it's a messy 8 ft at 9 seconds with cross-onshore winds. The energy jumps to 980 (moderate), but it's all windslop and chop, so more of a kitesurfing session than a paddle surf one if you're into that. By Saturday afternoon, it's back to tiny 0.3 ft bumps.

Then we slide into a dead zone. From Sunday the 30th of August right through to Tuesday the 10th of September, there's almost nothing happening. A few days show a tiny 0.3 ft or 2 ft wave, but with periods of 4 or 5 seconds and zero energy, it's just a ripple. The wind is often offshore or glassy, but there's no swell to work with. It's a long, flat stretch.

The only real standout, if you can call it that, is a small window on Friday the 28th afternoon. The swell is 6 ft from the north at 10 seconds, with a combined energy of 652 (moderate). The wind is cross-onshore and it's fairly choppy, so it's not great for a clean wave, but it's the biggest pulse we see. For a kitesurfer, it might be worth a look, but for a surfboard, it's a hard pass.

Bottom line: there are no good surf options in this 16 day window. Ruby Bay is a rare-breaker and this is one of those times. The forecasts can change, but for now, sit tight.

Rusty

Short Range Forecast

Heavy rain (total 24mm), heaviest during Fri morning. Very mild (max 16°C on Fri afternoon, min 9°C on Thu morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 14°C on Sun morning, min 7°C on Sun night). Winds increasing (light winds from the WSW on Sat morning, fresh winds from the SW by Sun night).

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
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
0
0
0
0
0
0
0
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)
0.4
NW
4
1
NNW
6
1.1
NW
6
0.1
N
17
0.1
N
16
0.8
N
5
2.5
N
9
1.9
N
10
1.2
N
9
0.8
NNW
8
0.1
N
21
0.3
NNW
7
0.6
NNW
5
0.7
NNW
5
0.4
NW
15
0.4
NNW
15
0.5
NW
5
0.2
NNW
15
0.5
NE
4
0.3
NE
3
0.1
NW
20
Wave Graph
Metric surfscale
Energy kJ
5
60
86
6
5
27
980
652
225
0
8
0
15
0
0
0
11
0
6
2
0
Wind (km/h)
5
WSW
0
SSW
0
N
0
ENE
0
ENE
10
N
25
N
15
N
5
WSW
5
WSW
10
WSW
10
SW
10
WSW
15
WSW
30
SW
5
WSW
15
WSW
15
SW
5
SW
10
W
10
WSW
Wind State
glassy
glassy
glassy
glassy
glassy
cross-on
cross-on
cross-on
glassy
off
off
off
cross-off
cross-off
off
off
cross-off
off
off
cross-off
off
High Tide
9:23PM3.67m
9:34AM3.60m
9:56PM3.88m
10:13AM3.76m
10:29PM4.06m
10:51AM3.89m
11:01PM4.17m
11:27AM3.97m
11:34PM4.21m
12:03PM4.01m
00:09AM4.17m
12:37PM3.98m
00:46AM4.05m
Low Tide
2:57PM1.28m
3:09AM1.27m
3:34PM1.02m
3:44AM1.07m
4:08PM0.81m
4:17AM0.88m
4:39PM0.68m
4:49AM0.73m
5:10PM0.62m
5:22AM0.65m
5:43PM0.63m
5:56AM0.66m
6:16PM0.71m
cloud
cloud
cloud
light rain
cloud
light rain
rain showers
rain showers
part cloud
part cloud
light rain
part cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:01
7:01
6:58
6:58
6:56
6:54
6:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:57
5:58
5:59
6:00
6:00
6:00
6:01
 mm
1
2
20
1
2
Temp °C
12
13
13
10
10
13
15
16
11
13
12
9
14
13
11
13
13
12
16
16
10
Feels °C
11
13
13
9
9
10
13
13
9
10
9
7
11
9
4
9
8
8
14
13
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 Ruby Bay Surf forecast

The above surf forecast table for Ruby Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ruby Bay can be found by selecting the local surf guide option on the grey menu. Our Ruby 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 (Ruby 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 Ruby 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 Nelson - Tasman Bay? If you are looking for accommodation near Ruby Bay, camping, hotels and holiday cottages in Nelson - Tasman Bay, consider staying in Nelson which is 17 km (11 miles) away. Alternatively, find information about places to stay and car hire in Blenheim which is 80 km (50 miles) away

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