Greenwich wave
buoy daily averages for Apr 2021 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
2 ft
0.3 — 7.2 ft
Average Wave period
6 secs
2 — 26 secs
Average Water temperature
9 °C
8.2 — 9.9 °C
Average Wind
NNE, 18 mph
2 — 38 mph
| Day | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 0.7 | 5.2 | NNE | 10 | 9.5 | |
| 1.8 | 5.3 | NW | 18 | 9.4 | |
| 0.7 | 5.6 | NE | 16 | 9.3 | |
| 1.0 | 4.8 | N | 9 | 9.4 | |
| 3.3 | 5.7 | NE | 27 | 8.9 | |
| 4.5 | 6.2 | ENE | 32 | 9.0 | |
| 2.1 | 5.2 | ENE | 27 | 9.1 | |
| 1.8 | 4.8 | ENE | 24 | 9.1 | |
| 2.7 | 5.6 | ENE | 28 | 9.0 | |
| 1.9 | 6.4 | NE | 22 | 9.2 | |
| 1.0 | 7.6 | NE | 10 | 9.4 | |
| 1.0 | 7.5 | E | 7 | 9.7 | |
| 1.0 | 6.5 | NNW | 9 | 9.3 | |
| 1.1 | 4.9 | NE | 16 | 8.9 | |
| 1.3 | 4.8 | NE | 19 | 8.9 | |
| 1.3 | 4.8 | NE | 19 | 8.8 | |
| 0.7 | 6.7 | NE | 14 | 8.9 | |
| 0.7 | 4.6 | SW | 8 | 8.9 | |
| 0.9 | 4.9 | WNW | 10 | 8.7 | |
| 1.9 | 5.3 | NNW | 19 | 8.7 | |
| 1.1 | 7.5 | NE | 18 | 8.8 | |
| 0.4 | 7.5 | W | 9 | 9.0 | |
| 0.7 | 5.3 | WSW | 11 | 8.8 | |
| 1.5 | 5 | NW | 18 | 8.5 | |
| 1.8 | 5 | NNW | 21 | 8.6 | |
| 1.9 | 5 | NNW | 24 | 8.9 | |
| 1.3 | 5.2 | NW | 14 | 9.1 | |
| 2.6 | 5.7 | NE | 25 | 9.0 | |
| 3.1 | 5.8 | NE | 28 | 9.1 | |
| 3.2 | 6.1 | NE | 30 | 9.3 |
Realtime data displayed on this page is from the Met
Office
Marine observations.