Spring in Sydney is going to draw to a soggy close, but the start of summer is set to sizzle. November has been a particularly wet month for Sydney, with just under 190 millimetres so far falling in the gauge. This has made it the wettest November since 1984. It is also looking like the wettest Spring since 1999, with the running total currently sitting at just under 268mm. The end of the month is set to see more wet weather, thanks to an approaching low pressure trough. Thursday will be the month's last decent beach day, as the trough directs northerly winds and a hot airmass over the Sydney Basin. The city is expected to warm to 30 degrees, with tops of 37 in Penrith and Richmond. On Friday morning the trough will arrive, causing winds to turn to a cooler southwesterly direction and become gusty. Showers will also develop, with most parts likely to see 10-15mm and the potential for up to 30mm in parts. By Saturday, just a shower or two will linger for the last day of Spring. As calenders are turned and the new season officially begins, another trough will move into the state, accompanied by another hot airmass. This will cause the mercury to climb and from Tuesday the city can expect three days of 30-degree heat, with about four days of plus-30-degree heat for the west. This will make it the longest run of heat since last Summer.