Dew Factor in Cricket: How Evening Dew Affects T20 Matches and Why the Toss Matters
A detailed explanation of how dew affects cricket — its impact on the ball, the outfield, and spin bowling in evening T20 and ODI matches, why chasing teams have an advantage, and why the toss is so crucial in dew-affected conditions.
Dew is one of the most significant and least controllable variables in limited-overs cricket, particularly in T20 matches and Day-Night ODIs played in the evening sessions across the Indian subcontinent, the Middle East, and parts of Southeast Asia. As temperature drops after sunset, moisture in the atmosphere condenses on any surface cooler than the dew point — including the outfield grass, the pitch, and crucially the cricket ball. This thin layer of water fundamentally changes how the ball behaves, transforming the competitive balance of a match and making the toss arguably the most important event in certain conditions.
How Dew Changes the Ball
A dry cricket ball can be maintained in a specific condition — one side polished and smooth, the other rough — to produce swing, seam movement, or spin. Dew destroys this. When the ball rolls through a dew-soaked outfield even a few times, both sides become uniformly wet and slippery. The dew neutralises the aerodynamic differences between the two sides that produce swing; a wet ball also becomes difficult for spinners to grip, reducing the revolutions they can impart and thus the amount of turn generated. Pace bowlers find the wet ball skids through lower and faster with less control over swing, while spinners simply cannot generate the same bite, turn, or drift as they could on a dry ball. In short, dew is primarily an advantage for batting teams and a significant disadvantage for bowling teams, particularly spin-heavy attacks.
The Toss Advantage in Dew Conditions
Because dew typically sets in after 8 pm local time, a team batting first completes their innings in drier conditions with an unaffected pitch and outfield. The team bowling second faces dew during their bowling innings (the second innings), when the ball is hardest to control, fielding becomes slightly treacherous (outfielders can slip, diving stops are harder), and spinners are largely neutralised. The team chasing faces these same dew conditions but from the batting perspective — meaning the ball comes on softly to the bat, and hitting through the line becomes easier than it would be in dry conditions. Consequently, in dew-heavy conditions, winning the toss and choosing to bowl first (thus batting second, chasing a target in dew) is widely considered a strategic advantage.
Spin vs Pace: Who Suffers More?
Spin bowlers suffer more severely from dew than pace bowlers, because spin bowling is uniquely dependent on the friction between the bowler's fingers and a dry ball surface. A spinner relies on being able to impart maximum revolutions; a wet ball slips from the grip, reducing rotation and turn. This is why teams playing in known dew-heavy venues — like the Dubai International Cricket Stadium or several Indian venues in October and November — sometimes opt for an extra pace bowler over a spinner in their T20 XI, or position their spinner to bowl earlier in the innings before dew intensifies. The 2021 ICC T20 World Cup, held across the UAE in the northern winter, was heavily influenced by dew: teams batting second won the majority of evening games, and spin-heavy teams from the subcontinent found it difficult to defend totals with ineffective spinners in the second innings.
Frequently asked questions
Why can groundstaff not simply remove dew from the pitch and outfield during a match?
The management of dew is one of the most practical and sometimes frustrating challenges for stadium groundstaff, and the short answer is that completely eliminating dew from a large cricket outfield during an evening match is genuinely impossible with current technology — though teams have developed increasingly sophisticated mitigation strategies. Dew forms continuously throughout an evening as ambient temperature drops toward the dew point. Even if groundstaff were permitted to mop the outfield between overs — which they are not during live play under ICC regulations — the dew would reform within minutes because the source is atmospheric moisture condensing on cool grass surfaces. The outfield is approximately 5,000 to 8,000 square metres of grass, and even with a large team of groundstaff mopping during strategic breaks (drinks breaks, innings intervals), only a fraction of the surface can be treated. The ball rolls across the entire outfield throughout an innings, picking up moisture from untreated areas almost immediately after any treated section dries. Groundstaff do use 'super-sopper' machines — large wheeled contraptions with rotating foam cylinders that lift surface water — during drinks breaks and especially during the innings interval to reduce outfield moisture as much as possible. Towels are also applied to the ball by fielding players throughout the innings, and umpires allow the fielding team to dry the ball on a cloth supplied at the crease. However, the ball cannot be artificially dried to the point of reversing its condition — the umpires monitor ball maintenance closely and there are strict rules about which maintenance methods are legal. Some venues in dew-prone regions have experimented with pitch and outfield treatments: special dew-resistant grass varieties that do not retain moisture as readily, and pre-game applications of substances to the outfield to reduce condensation. These have shown some effectiveness but have not eliminated the problem. The ICC has also occasionally explored scheduling adjustments — starting evening matches earlier so the second innings can be completed before peak dew hours — but broadcast commitments and audience preferences for prime-time cricket have limited this option. For the teams themselves, the accepted approach is tactical rather than logistical: select fewer spinners in known dew conditions, win the toss and choose to field first to bowl in dry conditions, and accept that dew is an inherent part of the game in certain climates and seasons. India's home T20Is in October and November, the IPL playoff stages, and ICC tournaments in the UAE are all contexts where dew planning is a formal part of team strategy.