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Boating forecast for Colwyn Bay

Find a forecast

  1. Extremely useful for viewing the forecast at a glance. You can quickly tell when the conditions are likely to better for boating and fishing.
  2. The summaries are useful to assist in understanding the weather patterns as well as planning your day and trips.
  3. The arrows show the direction of the wind. The direction of the wind is from the origin e.g. an easterly wind blows to the west. The dotted line is gust speed of the wind. For most spots you want the wind to be light (0 - 10 kts) for ocean conditions to be comfortable.
  4. The Sea height is the total wave height which includes both swell and chop. This is the most critical variable when looking at this forecast since a big sea height could be hazardous to boats or fishing off rocks etc. Swell refers to the height of the swell. The smaller the better. Chop refers to the height of the ocean chop. The less chop, the more comfortable conditions will be.
  5. The greater the swell period, the more comfortable the conditions are likely to be. It is believed sea sickness is triggered by a swell period around 5-6 seconds. However, the ocean chop can also cause sea sickness, so be aware of that too, especially if sea direction is considerably different to swell direction.
  6. Swell direction is represented by the origin of the swell. A westerly swell is moving to the east.
  7. Sea direction is represented by the origin of the chop. If there is not much chop this is not such a factor. However, you should check this variable if there is substantial chop, since if the swell direction is opposing the sea direction and swell and chop height are over 1 m, conditions could be rough.
  8. SwellMap presents tides as LAT (Lowest Astronomical Tide), which is the height above the lowest tidal water level

Forecast updated at 14:23 Wednesday 18 October (Europe/London local time)

Slide the graph to view all forecast days.



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Wind Gusts
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Swell Sea Chop
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Period
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Swell dir
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Sea dir
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Tides LAT
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Forecast updated at 14:23 Wednesday 18 October (Europe/London local time)

Slide the table to view all forecast details.
Wed 18 OctRating Summary Sea Swell Chop Period Swell dir Sea dir Wind Gusts
mmms°°ktskts
4h?--0.3--4----SE:44
10h60.10.2nan7NWSESE:78
16h3--0.1--7--SESE:68
22h50.00.1nan9NWSESE:810
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Thu 19 OctRating Summary Sea Swell Chop Period Swell dir Sea dir Wind Gusts
mmms°°ktskts
4h3--0.1--9--SS:710
10h50.00.4nan6NWSES:810
16h3--0.4--7--SESE:78
22h50.00.3nan7NWSESE:810
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Fri 20 OctRating Summary Sea Swell Chop Period Swell dir Sea dir Wind Gusts
mmms°°ktskts
4h3--0.3--5--SES:34
10h60.00.2nan4NWNWN:12
16h3--0.3--5--SWSW:810
22h30.00.2nan5NWSSE:1216
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Sat 21 OctRating Summary Sea Swell Chop Period Swell dir Sea dir Wind Gusts
mmms°°ktskts
4h2--0.2--7--SWS:1721
10h1--0.1--18--SWS:2733
16h1--2.6--10--SWW:2633
22h1--0.7--10--WW:2633
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Sun 22 OctRating Summary Sea Swell Chop Period Swell dir Sea dir Wind Gusts
mmms°°ktskts
4h1----------WW:2633
10h1----------NWW:2227
16h1--0.2--9--WW:2025
22h1--0.1--9--WSW:1214
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Mon 23 OctRating Summary Sea Swell Chop Period Swell dir Sea dir Wind Gusts
mmms°°ktskts
4h1--0.2--5--SWSW:1214
10h1--0.1--5--SWSW:1517
16h1----------SWSW:1619
22h1--0.9--6--SWSW:1216
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Tue 24 OctRating Summary Sea Swell Chop Period Swell dir Sea dir Wind Gusts
mmms°°ktskts
4h1--0.8--7--SWS:810
10h1--0.6--7--SES:810
16h1--0.6--7--SES:912

Forecast updated at 14:23 Wednesday 18 October (Europe/London local time)

Current sea temperature

Colwyn Bay sea temperature: 15°C

Sunrise and sunset for today

SunriseSunset
07:5318:07

Moon phases for the next month

Thu 19 OctFri 27 OctSat 4 NovFri 10 Nov
New Moon First Quarter Full Moon Last Quarter

Rating information for Boating

This rating is a guide to determine how pleasant the boating conditions are likely to be. But this should not be treated as a substitute for using all available sources of information for the purpose of safety.
10A green rating between 7 and 10 indicates calm waters, based on little or no wind, and swell height less than a metre.
6An orange rating between 4 and 6 indicates average boating conditions, possibly affected by light-fair winds, and a swell height around 1-2 metres.
1A red rating between 1 and 3 suggests poor and possibly dangerous conditions such as strong winds and a big swell height 2-3 metres plus.
?No rating available.

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