
Surf Forecasts:
Ruby Bay surf forecast from 9 Aug 2026:
- Best quality surf: Sunday 9 Aug, 6PM (local time) - 4ft (1.2m), 10s period, N swell with glassy winds.
- Most powerful swell: Sunday 9 Aug, 6PM (local time) - 4ft (1.2m), 10s period, N swell with 260 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 6PM (local time) - 4ft (1.2m), 10s 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 Sunday (Aug 09) at 6PM. The primary swell is predicted to be 1.2m and 10s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Ruby Bay in the next 16 days are 1.2m 10s and forecast to arrive on Sunday (Aug 09) at 6PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 9s period and expected on Monday (Aug 10) at 9AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 9th Aug) | 4ft (1.2m) 10s |
| Best Surf | 6PM (Sun 9th Aug) | 4ft (1.2m) 10s |
| Most Powerful | 6PM (Sun 9th Aug) | 4ft (1.2m) 10s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
G’day, Rusty here. Well, I’ve looked at the charts for the next stretch and, honestly, it’s a bit of a waiting game for Ruby Bay. This is a sheltered point that barely wakes up, so when it’s flat, it’s flat. The good news is there’s a little window of clean surf in the first couple of days, but after that, we’re looking at a long, quiet spell. Don’t get too excited – this is one for the patient ones.
The first real chance is Sunday morning, August 9th. It’s not big, but it’s rideable. We’ve got a 4ft swell rolling in from the north, with a period of 9 seconds. That’s a bit of a short-period wind swell, but combined energy is moderate at 276. The wind is light offshore from the southwest, which is exactly what this joint needs. The water is sitting at 53°F and it’s running a bit colder than normal for this time of year, about 2°F off the average, so you’ll want the hood and booties. It’s a beginner-friendly wave, but it’s inconsistent and rarely breaks, so you’ll be waiting around for the sets. The crowds are a possibility, so don't expect solitude. It’s a bit ordinary, but it’s the best we’ve got on offer right now.
Sunday afternoon glassed off completely with the same 4ft north swell, now with a slightly longer 10-second period. Combined energy is up a touch to 301. If the morning is a bit lumpy, the afternoon should be clean and smooth. Again, not a standout, but it’s paddleable.
After that, it’s a bleak run. The swell drops right off on Monday, down to 2ft, and from Tuesday onward it’s just tiny leftovers under 1ft or flat out. There’s a little pulse mid-week – Thursday sees a 4ft north swell with a short 7-second period, which gets energy up to 156, but it’s windswell and the conditions are rainy and clean. But the forecast scores for surf quality are absolutely zero, so this is a no-go. The period is too short to have any push, and it just looks messy.
From Thursday afternoon, it’s all downhill. We’re looking at a large gap of dead-flat conditions stretching from then right through to the end of the forecast window. There’s virtually no swell of any consequence. Some of those days show a 0.3ft blip, but that’s not surf, that’s just a ripple on the lake.
For the second week, there’s nothing to get excited about. It’s the same story: small, weak, and uninspiring. If you’re a kite surfer, the light winds might not even work for you. But for a paddle surfer, you’re wasting your time. The point break needs a bit of north in the swell, and it just isn’t there.
So, the call is clear: if you’re desperate for a wave, get out on Sunday morning or the glassy afternoon session. It’s small, but it’s clean. Beyond that, you’re looking at a two-week flat spell. It’s the nature of this place. When it doesn’t run, it doesn’t run. But this is one of those stretches where you just have to wait for the next weather system. Keep the board in the car, because forecasts can change, but right now, don’t hold your breath.
Rusty, signing off.
Short Range ForecastModerate rain (total 10mm), heaviest on Sun morning. Very mild (max 15°C on Mon afternoon, min 6°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Thu afternoon. Very mild (max 15°C on Fri afternoon, min 9°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | N 9 | N 10 | N 10 | N 9 | N 9 | N 8 | N 8 | N 19 | N 7 | N 10 | N 5 | N 7 | N 7 | N 7 | N 6 | N 6 | N 5 | NE 4 | N 7 | NW 17 | NNW 16 |
Wave Graph | |||||||||||||||||||||
276 | 301 | 183 | 0 | 53 | 35 | 11 | 7 | 4 | 2 | 20 | 82 | 156 | 100 | 29 | 10 | 5 | 1 | 1 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | glassy | glassy | off | glassy | off | glassy | glassy | cross-off | glassy | glassy | glassy | glassy | glassy | glassy | cross-off | glassy | off | off | off | off |
High Tide | 7:11PM3.37m | 7:18AM3.49m | 8:26PM3.68m | 8:29AM3.68m | 9:19PM4.01m | 9:29AM3.89m | 10:04PM4.25m | 10:20AM4.07m | 10:44PM4.38m | 11:05AM4.18m | 11:23PM4.39m | 11:46AM4.21m | 00:01AM4.32m | ||||||||
Low Tide | 12:01PM1.48m | 1:05AM1.32m | 1:27PM1.35m | 2:11AM1.08m | 2:38PM1.11m | 3:06AM0.82m | 3:34PM0.87m | 3:54AM0.61m | 4:21PM0.69m | 4:37AM0.49m | 5:01PM0.60m | 5:17AM0.48m | 5:37PM0.60m | ||||||||
7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | |
— | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | |
mm | 10 | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 3 | — | — | 3 | 5 | — | — | — |
Temp °C | 11 | 12 | 9 | 14 | 15 | 8 | 11 | 11 | 8 | 10 | 10 | 10 | 11 | 11 | 12 | 14 | 15 | 12 | 15 | 16 | 9 |
Feels °C | 10 | 11 | 8 | 12 | 14 | 7 | 10 | 9 | 6 | 9 | 9 | 10 | 11 | 11 | 12 | 13 | 15 | 11 | 12 | 13 | 6 |
Swell 1 Height (m) Direction Period (s) | N 9 | N 10 | N 10 | N 9 | N 9 | N 8 | N 8 | N 8 | N 7 | NE 4 | NW 13 | N 7 | NW 18 | N 7 | N 6 | N 6 | N 5 | — | NW 18 | NW 17 | NNW 16 |
276 | 301 | 183 | 79 | 53 | 35 | 11 | 5 | 4 | 1 | 7 | 82 | 12 | 100 | 29 | 10 | 5 | — | 12 | 11 | 25 | |
Swell 2 Height (m) Direction Period (s) | NW 18 | NW 18 | NW 16 | NW 16 | NW 15 | — | — | ENE 4 | — | N 7 | NW 16 | NNW 11 | — | — | NNW 11 | — | ENE 4 | NE 4 | — | — | NW 12 |
13 | 12 | 10 | 10 | 9 | — | — | 1 | — | 1 | 10 | 12 | — | — | 11 | — | 2 | 1 | — | — | 5 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | NW 15 | N 14 | N 19 | N 10 | N 10 | — | NW 19 | — | — | NW 18 | NW 8 | N 8 | NW 16 | N 7 | — | NW 5 |
— | — | — | — | — | 8 | 4 | 7 | 2 | 2 | — | 15 | — | — | 12 | 3 | 1 | 10 | 1 | — | 1 | |
Wind waves Height (m) Direction Period (s) | SW 2 | — | — | — | — | — | — | — | — | — | N 5 | — | N 7 | — | — | — | — | SSE 3 | SW 3 | — | SSW 2 |
1 | — | — | — | — | — | — | — | — | — | 20 | — | 156 | — | — | — | — | 2 | 1 | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 7 | 14 | 169 | 38 | 83 | 83 | 83 | 83 | 83 | 14 | 7 | 14 | 14 | 83 | 83 | 83 | 88 | 83 | 83 |
Best forecast wave conditions in Nelson - Tasman Bay | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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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











