Weymouth and Portland Harbour

One of the best racing venues in Great Britain today, Weymouth offers superb conditions for all types of racing. Central to the south coast of England, it attracts many classes of dinghy for their national championships, as well as other important events - like Olympic selection trials and the Olympic Games in 2012.

During April 2000, the new centre was opened in time for the British Olympic trials. It is based at the old Royal Naval helicopter base in Portland, and now offers good shore side facilities that were further improved for the Olympics in 2012.

The clubhouse offers a bar and excellent café serving hot food. Changing rooms are big and have decent showers. Launching facilities are excellent, with two wide concrete ramps into the harbour, accessible at all states of the tide. There is also plenty of car parking space, on site or opposite the centre in the gravelled areas.

Race Areas

There are two racing areas – either inside the breakwaters in Portland harbour itself, or outside the breakwaters in Weymouth Bay.

Portland Harbour

Portland harbour offers superb sailing and is home to the Olympic teams and host to countless class championships and events.

Wind Directions

Northerlies 340-020 degrees: Shifty! High land blocks the wind coming over Castle Cove, so the wind shifts when you are up around the windward mark area in the northern half of the harbour. Shifts can be up to 60 degrees when under the land, while down in the leeward mark area they are only 20 degrees – so don't go to the lay-lines! Gust-linking and working with the pressure is important and in the second half of the beats keep your options wide open – don’t commit to a side unless it’s obvious.

North-Easterlies 020-090 degrees: Go Left! There is convergent breeze to the left-of-middle, with a possible header on starboard as you go into the left hand side which lifts out on port as you sail off the north shore. It’s wise to test this with some split tacks depending on where your racing area is, and how far east the wind has gone. It’s more stable than a northerly, certainly once you’re into the right side of this wind-sector so the advice above is fairly reliable but if you’re between 020 and 040 with a forecast to go left then read the above too.

South Easterlies 090-160 degrees: This is the most stable direction in the harbour, in both direction and velocity. Because there are no fixed gain features in relation to the wind direction you won’t expect one side to pay significantly more than another. This means you can keep your options open and it will mean that boat-speed and hard work will pay. Good technique and executing the basic routines well (a good start, good roundings and hard work) will pay off.

Southerlies 160-220 degrees: This is the worst direction with the wind coming around both sides of Portland Bill as well as over the top of it! As you approach the windward mark area, standby to be capsized from above! What is critical now is the position of the windward mark in relation to the land-mass of the Bill. If the windward mark is more to the left, expect more lifts on port tack as there will be more instances of pressure coming through the left (east) side of the Bill as you look upwind (go left and stay under the lay-line). I f the windward mark is more to the right, expect lifts on starboard with the wind coming more around the western side (protect right and don’t go to the layline). Expect it to become shift and less predictable as you approach the windward mark, and keep your options open in the final stages of each beat as lots can be won or lost.

South Westerlies 220-280 degrees: Go Left! There is more breeze that way because of the convergence on the left-hand side of the course, around the northern edge of the Bill. The breeze comes in straight over Chesil beach and relatively unhindered until it hits Portland and the convergence can be really strong. As with all things, don’t hit the corner but nevertheless, go left, protect left, and err on the left side of the fleet keeping something in the bag for the unexpected – including a starboard lift at the end: If the windward mark is close to the northern edge of the Bill, be aware of a right hand shift lifting starboard tack, as the wind bends around the northern edge.

North westerlies 280-340 degrees: Left-of-middle normally pays as there is a divergence of wind on the south side of the course; however, the tide can now play an important part in your race strategy as you will see when we talk about the tide in the harbour.

Tide

In Portland harbour, the tide is really only significant during spring tides.

Its effect can be felt mainly near the entrances across the tide range, and also near the bridge up in the north- west corner of the harbour. The flood tide travels across the harbour from east-to-west, and clockwise around its western side up to the bridge. During the ebb, it travels across the harbour from west-to-east and anti- clockwise around the western side of the harbour, so be careful with your lay-lines in the lighter wind races.

Weymouth Bay

The main racing area is normally situated between the middle entrance of Portland harbour, 'A' head and White Nothe, where the cliffs begin to rise, straddling the twenty metre depth contour on the chart.

Wind Directions

Northerlies 340-030 degrees: Shifty! Eyes-out-of-the-boat with the wind in this direction. The shifts down in the starting area can be up to 30 degrees either side of the mean wind direction - and quite frequent (every one-to-three minutes). In contrast, up in the windward mark area, the shifts can be as much as 60 degrees within a two minute period. It is essential to know before the start the numbers on the compass - when are you high and low on either tack? So that at start time you know which is the lifting tack out of the starting area, then you can make sure that you are in sequence with the wind oscillations up the beat. With this information between your port and starboard earlobes, you can use this data to good effect each time you round the leeward mark.

Remember that in the northern hemisphere, as the wind leaves the land to come onto the water, there is an initial wind veer - moving to the right. So in a northerly wind, there will be a lifting port tack in towards the land. The closer to the shore you are, the bigger the lift will be - check it out on the day of the race. Also, look at where the mark is in relation to the valleys to the west of White Nothe. The wind is stronger coming down the valley with a spreading effect as it comes out onto the sea. This can lift you on either port or starboard tack, depending on the mark's position in relation to the exit of the valley.

North Easterly / Easterly 030-100 degrees: Go Left! There is more wind on the left because of the convergence. And if you get close enough to the land, you get headed as you go in on starboard tack and lifted as you come out on port.

South Easterlies 100-180 degrees: The most stable wind direction for the bay, in both strength and velocity - but it also produces the roughest sea! Tidal direction plays a more significant part now, which we will look at separately later.

Southerly 180 degrees: Work the middle-to-left up the beat, so as to stay away from the Bill (Portland Bill) where there is less wind because of the wind divergence. Caution - with an ebb spring tide, hard right can pay, especially in light winds if the starboard layline is anywhere near the wall of Portland harbour. We will look at this later when we talk about the tidal direction.

South South Westerlies 190-210 degrees: With the wind in this direction, the wind is well affected by the Bill itself, with the wind flowing around both its northern and southern sides as well as coming over the top and dropping vertically down on its north-east edge. Where the race area is in relation to the Bill, and how far away from it the windward mark is, will determine the best way to go up the beat. Generally speaking, if the Bill is more on the port side of the course it pays to go left for the convergence (giving more wind); if the Bill is more in the middle, look out for the shifts, especially as you get closer to it.

South Westerlies 220-250 degrees: There is now a natural wind bend in the bay, as the wind comes around the northern edge of the Bill, it is squeezed through Portland harbour. Out into the bay, it then starts to parallel the coastline. From the starting area, the long starboard tack takes you into the bend - heading you sailing in, while port tack lifts you on the way out. Be careful not to overstand the windward mark, especially with an ebbing tide.

Westerly 250-300 degrees: Between 250 and 270 degrees, it normally pays to work the shifts left-of-middle, with the wind coming around the northern side of the Bill. From 270 to 300, it pays to work the shifts right-of-middle, with the wind coming around the northern side of Weymouth town.

North Westerly 300-350 degrees: The wind is now coming from over the town, with shifts of up to 15 degrees. Once again, this is very much the numbers game on the compass, knowing your highs and lows as you exit the starting area and each time you round the leeward mark.

Tide

The tide in Weymouth Bay is only significant south of the ten metre line running around the bay, and more so as you get closer to the twenty metre line and to the south of that. The other area of tidal concern is along Portland harbour wall, northerly on the flood, southerly on the ebb, except at the north and middle entrances, where as you would expect, it is more westerly on the flood and easterly on the ebb.

In the bay itself, the flood tide comes past Portland Bill, then travels in a north-easterly direction sweeping clockwise around the bay. It is strongest either side of the twenty metre line and to the south, heading towards Lulworth Bank. The ebb tide sweeps around the bay anti-clockwise in a south-westerly direction. It is again strongest either side of the twenty metre line and to the south. Further North in the bay, tidal movement is minimal. Between the north entrance of Portland Harbour and Osmington is a large area of still water. Sea Breeze

A good sea breeze will develop in the bay given the following conditions:

Early morning whilst jogging prior to breakfast (!) if there is a light north-westerly blowing with a clear blue sky then by approximately 1100-1200, cumulus clouds start to develop over the land.

If you’ve had a clear morning and by late morning you can see that start of white puffy clouds forming inland then expect the sea breeze to come in. (Note that it’s temperature driven so very seasonal and very much a summer time thing.)

The initial direction is usually 160 degrees, backing to approximately 140 degrees as it builds, then veering with the sun as the day gets older. It should end the afternoon at approximately 240 degrees. So in the afternoon, protect the starboard side of the course as the wind starts to clock right.

Other Information Sources

Admiralty Charts

2255 (good detailed chart of the racing area)

Admiralty Small Craft Charts

SC2610 (Portland Bill to Anvil Point, just south of Poole, not as much detail as 2255 above)

Tidal Information

Tide Flow Chart Portland/Needles, published by Roberts Charts Admiralty Tidal Stream Atlas Number 257 (Approaches to Portland)

Tourist Office

Weymouth, phone: 01305 785 747