![]() ![]() The water vapor will then condensate into water droplets. This is the same process as in cloud formation, where air is rising and therefore cooled down until saturation is reached. If the air is cooled down, the water vapor will condensate into water droplets resulting in mist or fog. An airmass that have moved a longer distance over water will be more humid, than an airmass (with the same temperature) that have passed mainly over land. It will also depend on the track of the airmass. The humidity is depending on the type of air mass, as warm air can contain more water than a cold air mass. The air is always containing some amount of water – either as invisible steam, as liquid water droplets or as solid water - like ice crystals, snow and hail. Mist is often defined as a visibility between 10m, and fog as a visibility below 1000m. In general, the visibility is better when the winds are from a northerly direction (on the Northern Hemisphere) than when southerly winds prevail, as the northerly winds often brings colder drier and often cleaner air. Snow crystals will for example reduce the visibility more than rain drops. However, also the form of the aerosol will affect the visibility. The more aerosols that are present in the air, the poorer visibility. The visibility is depending on the number of aerosols in the air (water droplets, ice crystals or other particles like dust), as the aerosols will reflect the incoming light. Visibility reducing phenomena like smoke from forest fires, dust from sandstorms and blowing snow can sometimes affect large areas over land but are very seldom causing difficulties at sea and are therefore not discussed. ![]() This article will go through the most common weather conditions that could reduce the visibility at sea. Refer to our detailed weather forecasts for this information.Factors like humidity, wind speed and temperature, and is one of the hardest meteorological parameters to forecast. Air temperature, wind-chill and sunshine should also be considered before deciding on the kind of wetsuit needed to stay warm when surfing at Bondi Beach. Offshore winds cause colder deep water to replace surface water that has been warmed by the sun. This is especially true after heavy rain, close to river mouths or after long periods of strong offshore winds. The lowest seasonal water temperatures at Bondi Beach in the third week of July lend themselves to a 4/3mm wetsuit or a 3/2mm suit and 3mm neoprene boots.Īctual sea surface water temperatures close to shore at Bondi Beach can vary by several degrees compared with these open water averages. You'll need a 2mm neoprene top or a shorty at dawn/dusk or if it's windy. Bondi Beach water temperatures are always warm reach their highest at the beginning of February. We have calculated the average water temperature variation around the year as well as the extremes that have been observed on each date.Īll of the graphs for the surf breaks presented on are on the same scale to enable comparison between locations around the world.īondi Beach water temperatures peak in the range 22 to 25☌ (72 to 77☏) on around the 5th of February and are at their lowest on about the 18th of July, in the range 16 to 20☌ (61 to 68☏). This has been derived from analysis of two decades of oceanographic satellite measurements of nearby open water. Below is a graph of Historical Sea Surface Temperature for Bondi Beach.
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