According to AccuWeather, the morning is expected to remain cloudy with temperatures around 21°C and a 25 per cent chance of rain, but conditions are set to worsen after lunch with the probability of precipitation rising to 92 per cent.

Rainfall could reach 14.6 millimetres, with showers expected to last around two-and-a-half hours, while cloud cover is forecast to stay between 88 and 98 per cent and visibility may drop to three kilometres in the afternoon.

Sri Lanka ended the third day on 404 for four, trailing Pakistan by just 30 runs after the hosts declared their first innings at 434 for nine following 106.3 overs.

Dhananjaya de Silva remained unbeaten on 167 and captain Kusal Mendis was 117 not out, the pair having added an unbroken 249 runs for the fifth wicket to dominate the final two sessions on Wednesday.

De Silva brought up his 14th Test century and Kusal his 11th as Sri Lanka recovered from an early collapse to seize the initiative.

Pakistan's bowlers searched in vain for a breakthrough throughout the afternoon, with the visitors' batsmen negotiating the attack comfortably before bad light forced an early close.

The morning session on Thursday may offer Pakistan their best chance to make inroads before the expected deterioration in weather.

Ground staff will monitor conditions closely, with the forecast indicating that a reasonable amount of playing time could be possible before the afternoon showers arrive.

Sri Lanka will aim to extend their partnership and build a significant lead if play proceeds, while Pakistan need early wickets to stay in the contest.

Brief scores: Pakistan 434-9 declared (106.3 overs); Sri Lanka 404-4 (Dhananjaya de Silva 167*, Kusal Mendis 117*).

The ongoing fixture represents the first time a Test match has been scheduled in Durban during the month of October. Because of the time of year on South Africa's eastern coast, natural sunlight at Kingsmead typically diminishes shortly after 18:00 local time, prompting officials to schedule an earlier start time of 09:30 to maximize playing hours.

Despite the prompt start, deteriorating visibility has repeatedly forced players from the field well before the scheduled close of play. On the opening day, action was suspended at 15:23 local time after thick clouds rolled in, restricting the total output to just 65.2 of the scheduled 90 overs without any opportunity for a resumption.

Conditions showed only marginal improvement on the second day of the encounter, with play able to continue until 16:25 local time before umpires deemed the light too gloomy. Although this represented an extension compared to the first day, it still resulted in the loss of 35 minutes of potential cricket.

The third day followed a similar pattern, with umpires calling a halt to proceedings at 16:31 local time as visibility worsened. Across each of the opening three days, the morning and afternoon sessions have unfolded under hot and sunny skies, only for atmospheric shifts to cause sudden interruptions late in the day.

The recurring issue highlights a weather phenomenon characteristic of Durban, where morning sunshine heats inland areas and generates a sea breeze. BBC weather presenter Chris Fawkes explained that this mechanism increases humidity levels through the morning and introduces cloud cover before cooling evening temperatures raise relative humidity further.

The resulting atmospheric saturation causes the coastal cloud layer to become progressively thicker and lower as the afternoon transitions into evening. This persistent issue has once again thrust cricket's historical struggle with ambient lighting into sharp focus, frustrating spectators and participants alike.

The timing of the disruptions is particularly striking given that the International Cricket Council introduced an updated playing condition just last week following a trial period earlier in the year. The governing body amended its rules to permit the use of the pink ball in standard Test matches to combat bad light scenarios.

Crucially, the regulation does not permit teams to swap a red ball for a pink one mid-match when visibility deteriorates, a remedy previously mooted by figures such as former England captain Michael Vaughan. Instead, the updated guideline stipulates that participating teams must agree prior to the commencement of a Test to utilize the pink ball throughout the entirety of the fixture.

Neither the South African nor the Australian camp held discussions ahead of the Durban Test to implement the pink-ball provision. Consequently, the traditional red ball remained in play, leaving teams vulnerable to traditional stoppages when natural light fades beneath heavy cloud cover.

The pink ball has previously been established as a core component of day-night Test cricket because it remains more visible than the darker red alternative under floodlights. Former South Africa bowler Shaun Pollock, who served on the ICC committee that recommended the rule change, pointed out that a cultural reluctance persists regarding the equipment.

Pollock noted that a distinct stigma surrounds the pink ball within the professional game, with critics frequently claiming it behaves unpredictably. "They say it moves too much," Pollock observed when discussing perceptions among players and analysts around the globe.

The former fast bowler defended the introduction of the rule change, highlighting the quantity of competitive action lost to poor visibility. "If Australia were 124-6 and we were using the pink ball, everyone would have said it was the pink ball's fault," Pollock stated, referencing Australia's score on the first day before they recovered to post 390 in their first innings.

Pollock added that if Australia had advanced from a precarious position to reach a substantial total using the pink ball, critics would likely have blamed the equipment for softening prematurely. Emphasizing the lost time, he asserted that adopting the pink ball would have salvaged 45 additional overs of Test cricket in the current match.

Despite the arguments for increased playing time, skepticism remains regarding the behavior of the pink ball during daylight hours. Ball-tracking data does not support the widespread narrative that the pink ball deviates significantly more through the air under floodlights compared to a red ball.

Batters have frequently reported that the pink ball presents greater tracking challenges against various backgrounds, and batting averages during the evening sessions of day-night matches remain historically low. Australia possess extensive experience with the concept, having participated in 15 day-night Test matches, which is 10 more than any other international side.

Unsurprisingly, statistics from day-night fixtures show that the four leading wicket-takers in such encounters are all Australians. Left-arm fast bowler Mitchell Starc leads the discipline as the undisputed pink-ball specialist, having claimed 89 wickets across his 15 day-night Test appearances.

Given Australia's dominance with the pink ball, opposing teams may understandably hesitate to agree to its use outside of scheduled day-night fixtures. Former South Africa bowler Vernon Philander voiced support for an alternative approach, suggesting that umpires should possess the authority to mandate a ball change during a match if conditions dictate.

Philander acknowledged that such a measure could complicate questions surrounding the competitive integrity of a Test match. He argued that the decision should be removed entirely from the players to avoid tactical friction between competing sides.

"They have to take it out of the hands of the players completely and enforce it from the umpires' point of view that the pink ball will become in play when the light has faded enough," Philander stated regarding potential procedural reforms. He maintained that regulatory bodies must take decisive action to resolve the sport's persistent lighting dilemmas.

As the first Test in Durban progresses toward its conclusion, Australia maintain a commanding position despite the truncated sessions. The tourists lead by 139 runs heading into the latter stages of the match, leaving South Africa with a significant task to overturn the deficit when play resumes under the coastal skies.