Greenwich wave
buoy daily averages for Jul 2025 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
1 ft
0.7 — 5.6 ft
Average Wave period
9 secs
5 — 26 secs
Average Water temperature
17 °C
15.3 — 18.3 °C
Average Wind
W, 14 mph
2 — 31 mph
| Day | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 1.0 | 6.7 | W | 15 | 17.4 | |
| 1.1 | 7.3 | WNW | 12 | 17.5 | |
| 1.1 | 7 | W | 11 | 17.2 | |
| 1.1 | 7.2 | WNW | 13 | 17.3 | |
| 1.1 | 6.7 | NW | 13 | 17.1 | |
| 1.0 | 6.6 | WSW | 15 | 17.2 | |
| 0.9 | 7.7 | NW | 11 | 17.4 | |
| 1.0 | 6.6 | NNW | 15 | 17.2 | |
| 1.1 | 7.9 | W | 10 | 17.2 | |
| 3.0 | 6.1 | WSW | 22 | 16.9 | |
| 2.7 | 6.8 | WSW | 17 | 16.9 | |
| 1.8 | 6.4 | S | 16 | 16.9 | |
| 1.2 | 8.6 | W | 11 | 17.1 | |
| 1.3 | 8.6 | NW | 6 | 17.2 | |
| 1.2 | 7.3 | WSW | 10 | 16.6 | |
| 2.8 | 6.5 | WSW | 18 | 16.5 | |
| 3.6 | 6.5 | SW | 24 | 16.4 | |
| 1.6 | 6.3 | SW | 20 | 16.5 | |
| 0.8 | 10.8 | E | 13 | 16.6 | |
| 0.9 | 16.8 | ENE | 14 | 16.6 | |
| 0.7 | 24 | ENE | 9 | 17.0 | |
| 0.7 | 18.9 | WSW | 7 | 16.7 | |
| 1.0 | 8.5 | W | 11 | 16.3 | |
| 1.8 | 6.4 | WNW | 16 | 16.1 | |
| 2.4 | 6.2 | NW | 16 | 16.1 | |
| 2.5 | 6.1 | WSW | 17 | 16.0 | |
| 2.1 | 6.1 | WSW | 24 | 16.0 | |
| 0.9 | 8.8 | W | 11 | 16.3 | |
| 1.3 | 7.3 | NNW | 9 | 16.0 | |
| 1.3 | 8.3 | W | 13 | 15.7 | |
| 1.3 | 9.7 | SW | 12 | 16.1 |
Realtime data displayed on this page is from the Met
Office
Marine observations.