The most detailed information about the water temperature in Castlerock in Irish Sea (Northen Ireland, United Kingdom). Forecast of changes in water temperature for the next 10 days. Statistics by months for recent years. Information about the neighboring resorts. Weather forecast in Castlerock for a week.
Water temperature in Castlerock right now
data updated 21 minutes ago48°F
yesterday: 47°F
a week ago: 47°F
Trend: stability
Today water temperature in Castlerock is 48.4°F. In general, this water temperature is unacceptable for swimming. But hardened people can afford to be in such water for 5-10 minutes. In any case, the general weather is also important. So, the air temperature at the same time will reach 50°F.
Analysis and forecast
The water temperature today roughly corresponds to the average value on this day in recent years. Its value has rise both over the past 20 days and over the past week. Exactly a year ago, on this day, the water temperature in this location was 46°F. Water temperature range in Castlerock in April is from 44 to 50 degrees.
According to our forecast, the water temperature in Castlerock will move in different directions, in the coming days the water will become warmer, but after 10 days it will still get a little colder to 48°F.
Table of water temperature values in Castlerock
| Day | Fact* | Average** | Forecast*** |
| Apr 11 | 9.0°C | 8.3°C | |
| Apr 12 | 9.1°C | 8.3°C | |
| Apr 13 | 8.5°C | 7.8°C | |
| Apr 14 | 8.7°C | 8.0°C | |
| Apr 15 | 8.1°C | 7.8°C | |
| Apr 16 | 8.4°C | 8.8°C | |
| Apr 17 | 8.7°C | 8.3°C | |
| Apr 18 | 9.1°C | 8.5°C | |
| Apr 19 | 8.0°C | 8.6°C | |
| Apr 20 | 8.0°C | 8.6°C | |
| Apr 21 | 8.5°C | 9.1°C | |
| Apr 22 | 8.8°C | 9.4°C | |
| Apr 23 | 9.0°C | 9.6°C | |
| Apr 24 | 8.5°C | 9.1°C | |
| Apr 25 | 9.3°C | 10.0°C |
** Average - Average water temperature on this day in past years
*** Forecast - Our forecast for the water temperature
Actual nearshore temperatures may vary by several degrees from the indicated values. This is noticeable after heavy rain or after prolonged periods of strong winds. Some downstream winds cause cold, deep waters to replace surface waters that have been warmed by the sun.
To develop a forecast, we use our own mathematical model, which takes into account the current change in water temperature, historical data and the main weather trends, wind strength and direction, air temperature in each specific region. We also take into account data for other resorts in United Kingdom.
Annual graph of average water temperature change in Castlerock
Water temperature in Castlerock by month
Castlerock located in the northern hemisphere, at latitude 55 degrees. The water in this location never warms up to comfortable values. Average annual water temperature on the coast in Castlerock is 51°F, by the seasons: in winter 48°F, in spring 47°F, in summer 56°F, in autumn 55°F. Minimum water temperature (44°F) in Castlerock it happens in March, maximum (59°F) in August.
You can find out detailed data on how the water temperature in Castlerock changes in each specific month:
Castlerock: general information and map
Neighboring cities and resorts
| City | Water* | Distance** |
| Portstewart | 48°C | 5km |
| Portrush | 48°C | 9km |
| Portballintrae | 48°C | 16km |
| Moville | 48°C | 17km |
| Dunseverick | 47°C | 24km |
| Culdaff | 48°C | 27km |
| Culmore | 49°C | 33km |
| Ballycastle | 48°C | 35km |
| Londonderry | 48°C | 38km |
| Buncrana | 48°C | 43km |
| Cushendall | 47°C | 47km |
| Waterfoot | 47°C | 48km |
** Straight line distance in kilometers
The warmest water today in United Kingdom recorded in Challaborough, its value is 52°F. Lowest - in Airth, there water temperature now 43°F. Average water temperature in the country today - 48°F.
Water temperature data in Castlerock and neighboring towns and resorts collected from various sources, using buoys, using satellite maps of sea, river and lake surfaces of the NOAA agency.
We use data from various local authorities in each specific location of the world to more accurately reflect temperature values.
The nearest airport is located in a 18 kilometers. This is Ballykelly (BOL) airport. We have no information as to whether it is valid and what flights it receives or sends.
Castlerock: weather forecast
The weather forecast is shown in local time in Castlerock
32km/hhumidity: 91%, clouds: 100%
30km/hhumidity: 95%, clouds: 100%
30km/hhumidity: 89%, clouds: 99%
29km/hhumidity: 85%, clouds: 99%
29km/hhumidity: 84%, clouds: 100%
27km/hhumidity: 86%, clouds: 94%
23km/hhumidity: 82%, clouds: 99%
25km/hhumidity: 72%, clouds: 75%
18km/hhumidity: 69%, clouds: 30%
13km/hhumidity: 77%, clouds: 24%
9km/hhumidity: 90%, clouds: 20%
6km/hhumidity: 87%, clouds: 24%
4km/hhumidity: 85%, clouds: 46%
6km/hhumidity: 87%, clouds: 57%
1km/hhumidity: 63%, clouds: 46%
6km/hhumidity: 59%, clouds: 40%
9km/hhumidity: 63%, clouds: 61%
5km/hhumidity: 70%, clouds: 75%
3km/hhumidity: 76%, clouds: 95%
3km/hhumidity: 74%, clouds: 99%
1km/hhumidity: 77%, clouds: 100%
1km/hhumidity: 80%, clouds: 100%
5km/hhumidity: 78%, clouds: 88%
9km/hhumidity: 78%, clouds: 52%
10km/hhumidity: 79%, clouds: 61%
7km/hhumidity: 84%, clouds: 58%
5km/hhumidity: 88%, clouds: 72%
3km/hhumidity: 89%, clouds: 56%
2km/hhumidity: 90%, clouds: 58%
3km/hhumidity: 89%, clouds: 73%
7km/hhumidity: 80%, clouds: 100%
9km/hhumidity: 73%, clouds: 100%
8km/hhumidity: 74%, clouds: 100%
6km/hhumidity: 80%, clouds: 100%
7km/hhumidity: 89%, clouds: 87%
8km/hhumidity: 93%, clouds: 77%
